Everyone has that one champion that always seems to be a problem on the enemy team, not a frequently banned or known OP - champion.
Mine?
No matter what I do, it seems like the enemy Swain, Malzahar or Volibear always get big. Nothing I do stops it but it just happens.
Fucking Win Nao. I hate this son of a bitch
Always always Yi.
Whenever there's one on my team he feeds. But when there's one not he other team, he camps a lane, gets a kill then goes on to 1v5 3 different times.
Some champions punish you for making mistakes. Supports with a hook ability punish you for not paying attention to the enemy. Junglers punish you for being too aggressive without warding. Teemo? He punishes you for walking around your own house
this big pizza crap right here
Cho'mama
So much lane sustain, its like poke does nothing to him, plus he has a 100% AP ratio AOE knockup and slow... like why's that allowed? And then to add he gets to do extra damage to towers with his AA buff and a 70% AP ratio cone-AOE silence for 1.5-2.5 seconds and then a fucking built-in smite, plus he can build full AP and still be tanky with his ult health.
pls.
Invisi-bitch
I don't know, she just carries every game I play. And not just by ganking a lot, she gets fed every time, to the point she can 3v1 and its so annoying. Especially when she goes part tank.
Mundo Mundo!
Not really OP... but annoying as fuck. So much sustain and just cleavers you down and spams laugh or taunt.
This little bitch 
Leona, thresh, naut? No problem.
I think its because he pulls you in and doesn't dash to you, and unlike thresh you don't have much reaction time because its N a staggered pull.
Hooks and huge aoe silence
Not hard to deal with just the fear is annoying and is split pushing 24/7
I don't know how but whenever there is an ahri vs me I do really bad
Has a ton of lane pressure
"Shit, they kept up with me." http://vignette3.wikia.nocookie.net/leagueoflegends/images/c/cc/Dragon%27s_Rage.jpg/revision/latest?cb=20110402010430&format=webp "I wasn't even worried."
#Why am I not allowed to escape/catch this blind jerk?!
Trundle is incredibly strong right now, I'm glad nobody plays him jungle. It takes 4-5 people to kill him in the late game. That's a problem for everyone though.
For me? I hate Blitzcranks. I just don't find it fun to play the positioning game every second of a game. If there were no game suspensions, I would dodge every single game that a blitz was picked.
For me it's Zed. I always have issues with the enemy Zed getting fed and just blowing me up, since a lot of the times I play squishy champs. (My Main roles are Adc and Support). When I do go mid, my favorite to play is Cho'gath because I can shut down a Zed pretty hard.
It's impossible to win against a decent one.
Zed and Cho always get me. I don't even play mid that much anymore but when I do, I will find a zed/cho and they will kill me.
I dont think he is op but nasus is very anti fun.
You have him on your team and he afk farms like nobody's business.
You play against him and you have to baby sit or he will eventually 1v5 your team.
It isn't that i think he is op or anything, he just makes that specific game he is in dull and boring for me as I am a top laner.
He can build zero lifesteal but still sustain as hard as someone like Aatrox whilst deal up to 50% of people's health in true damage.
You can't avoid him dominating late game. So you have to win the match through stomping so hard his team surrenders or actually camp Nasus's lane ASAP.
He gets a couple of crits on you at level one and you essentially have zero lane pressure because, 1, your potions aren't healing fast enough for you to CS with a safe amount of health. Even worse when he get a couple of lucky crits in and kills you because by the time you come back the Trynd is already level 3 and you still need a couple of minion waves worth of experienced to hit level 2. I play Wukong, so he's extremely annoying to deal with.
I play defensively, they get fed.
I play aggressively, they get fed.
I wipe the floor with them, they get fed.
They get fed, they get fed.
Tryndamere even if I'm not against him.
If the champ is in my lane then : 
LUX. everytime I see her I feed her 10 qeels. And Yas always makes a comeback too.
Believe it or not, a good Malphite usually wins games.
All tank, tons of damage - GG.
for me it's always
doesnt matter the lane i will some how lose to it
Even before his rework, Darius. I just have some mental block against Darius. Think it is the PTSD from his release state.
That and Volibear. Eff that bear.
Nautilus support. That's the one support against whom I will fuck up 100% of the time. Recently ended up with a Naut support that was like 4/0/something 3 minutes into the game in a couple weeks ago because he decided to go fuck up our jungler and midlaner after getting a doublekill botlane.
He was so absurdly fed I couldn't help but find it hilarious.
Fizz and Yasuo. Fizz because he'll always get fed and Yasuo because I simply hate him.
Vayne on the enemy team always seems like a god and vayne on my team always seems like they try to be gosu 5mins in ans gives 1st blood loses tower and level 5 at 15 mins
I still feel weak to Garen all game.
And I don't get how Pantheon counters Yi. Sure it's his passive, but blocking one or two hits doesn't stop the next 15.
I always make poor decisions against these champions.
Katarina, Darius and vi.
.
Mostly when she's jungle.
She's a fucking pain in the ass. Lane Nidalee is bearable, but when she's jungle I constantly fear her because she can travel pretty fast through the jungle with her passive and spears can come from anywhere.
Also, as a laner, you're gonna have to rely on your jungler trying to stop her, so it's not really in your hands a good amount of the time.
I hate her.
Give her another rework. 
I don't play top much compared to the other lanes and he's rarely picked so I've not had time to practice the matchup against him, but every time I end up vs a Yorick I just can't do anything in lane.
Not because of his kit so much, but because I main jungle, and a good shaco just makes my game miserable. Tried to take a buff? No, he already got it. Or he smites it. Or just kills me. And then you can't even run him down and punish him for it because he's invisible now.
Because everyone I see does literally nothing but split push. I get that it's a viable and effective strategy, but it always seems remarkably selfish and petty to me. "You're going to play the game how I dictate or you lose. I will do nothing to help my team, but you still have to babysit me forever or you lose."
I hate this guy so much. Get hear his turrets? Welp, there goes half your health. Someone coming to gank him? Double kill for heimer. The champ is jusy so damn annoying cause unless you have range, you can't do AANYTHING against the heimer.
Also
So glad he's unbalanced otherwise he'd stay on his trollpole forever. A skill that damages in an aoe and makes you untargetable on a 10s cd is NEVER Fun. At least ekko has like a 100s cd on his ult or smth.
her humongous e takes so much space in lane and now that she can reactivate it in mid flight makes it so annoying play against
This champion probably doesn't need a explanation but still his whole kit is really annoying. From his windwall to not being safe near your minions and to a ult making you feel useless. Yasuo is both a champion I have to give respect and distaste towards because I hate laning against one but I admit he is a very difficult champion to play and I have to give a round of applause to those people that can play Yasuo pretty damn well.
I dislike the design and gameplay of no other champion more than 
No matter how much I chase her down when playing someone with high mobility like I still can't catch her.
Weak early game my ass. Losing a trade? Press E. Now you won the trade. And don't ever think about getting low in lane against her because stun W auto Q does over a third of your health.
believe it or not 
is my problem champion. it is not because of the enemy bard. it is because of my bard who trolls me
fill or disco nunu
Dis bish
I play Voli and Udyr. Both don't a a dash/blink type gap closer.
Yi and Wukong suck :P but Volibear and Heim support.
I hate playing against 
. I can dominate against her in lane as yasuo or lucian 
mid. But the second she leaves lane and goes bot.... 'Enemy Double Kill!' . While I'm spamming ping to back off bot/top.
Hmm, for me i would have to say this chick 
.
I am pretty damn sure i have never won a non ARAM game against her. Because its either i am in lane with her and get shit on or my team is incapable of preventing her from getting the advantage she wants, and no i am not saying i am exempt from that statement. I find it a stupid that a champion with so much damn utility is capable of burst harder then an assassin to your entire team.
I know how to beat him, but he is an instant tilt champ for me.
This is partially from an ARAM perspective since I've been playing it a lot recently.
Can't stand Blitzcrank. Nautilus and Thresh's hook are nothing compared to his. You get pulled to him. The other at least get pulled to you putting themselves somewhat in danger. Not to mention, his combo. If Thresh or Nautilus hooks you, that's the worst of it. Blitz, you get knocked up + silenced, so you're not doing anything for about 3 seconds, which is more than enough time to get deleted by the enemy team.
Jax, I really just can't stand his jump and stun combo. It's so fast and he deals tons of damage.
Teemo can honestly just rot. I always seem to go against Teemos and never have one on my team.
Xerath is only annoying in ARAM. His range needs a nerf in ARAM because of how small the area is. In Summoner's Rift it's fine, there's plenty of maneuverability. Howling Abyss? Good luck dodging his laser or his ult.
Yes! that last tower shot that already launched Is gonna kill him! Yes!
.............. OH FUCKING HELL
