There are several champions that are in need of some much-needed improvements. They feel really weak, or should I say, they don't help their team as much as others. Picking them is a huge handicap to your team.
I'm sure I have missed some, but these, in particular, stand out in my mind as being extremely behind in overall power.
I'd like to add:
Late game Zilean offers a 36 second cooldown GA on anyone lmfao are you trolling?
Since when has karthus been weak 60% winrate if you play more than 20 games on him
Kennen can stun an entire team in under a second wtf
This list is so bronze
Singed is being played in Challenger right now
Aurelion Sol is a great pick in competitive play
Zilean is fucking good, no question about it.
Urgot is good, just weird af and ugly so almost no one likes him. Just ask anyone who tried him in Nemesis Draft. He's not weak at all.
Kennen is a pocket pick for a lot of roles and sees competitive play.
Karthus, too many counters (like WAY TOO MANY) so yes. Though Lost Chapter helps him out A LOT. Fiddlesticks as of right now, yes. Kindred, yes, but only because Squishy ADC jungler makes for terrible team comp balance and games are too short for her to scale.
If I had to add to the list it would be:
(worse version of Darius in every relevant category)
(relative to how hard she is to play she is quite weak. Too many dashes to make her spears worth a damn)
(anyone who doesn't one-trick this champion is going to have a very-very bad time failing their ults and subsequently doing practically nothing)
Zilean - Has a 99% slow that he can do twice, and at max-rank/45% CDR he can spam that thing on someone every 3-4 seconds twice. Has a 34 Second GUARDIAN ANGEL. Has a 100% AP SCALING AOE Stun bomb Has a 99% Speed boost that he can do twice, and at max-rank/45% CDR he can spam that thing on someone every 3-4 seconds twice. Has a really spammable kit that allows him to run at the speed of light after he gets Ludeons. Zilean is useful.
Urgot - Urgot is trash, he needs a rework like right now.
Karthus - Hah aha what? Q - Does crazy spam-damage when their alone and medium aoe-damage when grouped. W - A huge slow thats almost as long as the whole lane that decreases their defenses as well? E - The ACTUAL main DPS of Karthus. Does so much damage combined with Rylais/Liandries , and has a long aoe-range. R - Where do I even start? Does heavy damage early-late game to the whole team, can pick off stragglers, and can be used in passive. PASSIVE - Triggers his E, makes him invincible for over 5 seconds, lets him use abilities, If Karthus dies in the middle of a teamfight and someone like Malphite ults their team while their caught in Karthus's E, they are dead.
Fiddlesticks - Fiddle is in a weird spot right now. Q - Really good for getting rid of major threats like a fed Yasou or Vayne (2.25 Second FEAR) W - Good Sustain, Solo Drag, and in some cases, Solo Baron. E - AOE TEAM SILENCES, Thats all. R - Big AOE Damage, even bigger with Rylais and Liandries. Passive - Not that great? I see what they were trying to do but it doesn't last long enough and only lasts for the first couple of ult seconds.
Kennen AOE TEAM-WIDE STUNS, Many stuns, many aoe damage.
Kindred - Kindred does crazy damage once she has all her marks, I've seen Kindreds that seemed to do almost 20% of current hp per autoattack on people. Her ult allows for saving the whole team from Malph, Kat, Ect. And shes just a really great AD Jungler
Space Dragon If he lands his E-Q, Its almost a 100% win team fight. Q Stuns W does tons of damage to their whole team If they get close, Fus Ro Dah. (R) Can get away using his E passive or active.
Kayle - Really strong early-game to late-game, has good range, can do aoe damage with auto attacks, can heal, and can grant invincibility. Shes basically a support-carry.
Singed - Q - Crazy damage, and increased tick-speed melts people. W - Slows them down, and can root. E - Flips them into his gas, and disables people, and lets yasou ult onto them. R - SPEED, AP, REGEN, Everything he could do before is now on steroids. Passive - Builds mana? Gets tanky? He never has to turn his Q off.
feelsbadman. no buff they ever give him seems to stick.
he got one a couple of patches ago, and since then he dropped right back to where he was before.
is the next rework. so that should change very soon. like probably within the next month, now that the new champions are released.
- Zilean
Maybe, but he is always just under the surface of op. GA on an ult is always good.
- Urgot??
Getting reworked soon.
- Karthus
Recently got played in pro korean play, he is good but maybe not top tier.
- Fiddlesticks
Actually highest winrate mid for some time now. Not seen it too much so can't comment on how good that is.
- Kennen
AD kennen top is a top tier pick atm.
- Kindred
Is a weak yeah.
- Aurelion Sol??
Is strong but very hard to play.
I'm sure I have missed some, but these, in particular, stand out in my mind as being extremely behind in overall power.
I'd like to add:
- Kayle
Has had the highest winrate top for over a year now.
- Singed
He sees a lot of niche play at high level and wins a decent amount.
If zilean were to get buffed he'd be pretty op.
Maybe a new passive.
If you're going to put Kindred here then at least have the decency to put other non-meta junglers. It's biased to say that Kindred is useless since she takes a lot of knowledge and consistency to succeed vs. the "AA>Q>AA>R" that Graves does. Hell, you could even argue Shyvana but it's simply based on the player. Can't agree with Kindred or any jungler you've slapped onto here.
Zilean is one my most hated champions because a good one actually makes the game that much harder to win. And on your end, it makes plays a lot safer to pull off. You must not have ever met a good one in your games before. Urgot is already getting a rework. Karthus scales based off of enemy's lack of awareness (which is high in solo queue). On-hit Kennen isn't a liability, but AP Kennen is. Aurelion Sol was downright broken on release but was overlooked due to lackluster gameplay. Kayle is a good champion when used properly, I suggest you actually look at her winrate and who actually uses her (typically you will see lo boosters picking her up for extremely high winrates). Dark Seal Singed is far from a liability. It's still nasty when used properly but you can't expect just anyone to be playing Singed intelligently.
It's sounding to me more like you're getting teammates who are not that experienced on these champions. Why not 
? Since we're going that route about players being the issue and not the champions.
I think being under-rader/underrated, too situational, or just being weak overall are all different categories to consider and the 3 of them are not just equivalent/synonymous.
zilean is really good lol
