Certain champs with ridiculous play-style through their kits?
Disclaimer: I haven't fought against a number of these champs in a while, but they feel so annoying to face in competent hands. This is more of a vent.
You're poisoned? Say bye to half your hp.
Let me just run at you and stun your whole team twice with obscene overall damage.
I'm gonna pull you through 4 walls and a dragon if I hit you with my hook, no matter what.
Let me run at you and virtually never die. Or, let me throw my low-mana cost bird at you every 10 seconds. I know, GW, but it's still a ridiculous playstyle.
I'm gonna break/ruin literally every onspell item Riot musters up.
No one's gonna die ever.
Idk why, but I deserve 60-120 mr/armor for free.
Overloaded. Retained un-nerfed status and even buffed status until this PBE cycle.
If you get hit by a Q, whether as support or AP, you're probably dead. Similar to Viktor in midlane, where they just constantly shove very easily.
Old 
pretty much had Guinsoo's in a nerfed state for his whole existence. Sated Devo was broken by every onhit champ there was.
Idk any others.
I don't hate these champs, but it's often frustrating to face them. Again, this is just a vent...while I would like the changes to the frustrating and yet, iconic parts of their kits.
