Are League of Legends champions overpowered?

I have heard so many times that "Yasuo is too OP, it's broken!" or "Zoe is so OP" etc. Do you think any champion in LoL is OP or should be nerfed? Because I think NOT. For me it's pretty balanced but I would buff Aurelion and Taliyah a little bit :p.

I don't really think they're overpowered.. people need to learn how to play against them

when you play against zoe, she feels like shes overpowered, but its all about dodging those shots

Naaah, they are not overpowered. LoL is basically balanced IMO, every champion got a counter. If you play DOTA2, you'll notice that the heroes there are way more powerfull and gamechanging than LoL's Champions. LoL is not a game that got overpowered character concepts, but in one patch or another some characters do get very strong because of buffing/nerfing.

But the problem of buffing/nerfing is not because of the game, every game that has some kind of balancing system has this problem.

A good player makes a champion broken. Or at least lets it apear like it is.

There is a bunch of champions who are really really good and you can carry the whole game! :-D For Example Xerath , Kog & so on! But its always up to the player at bronz -> diamond. after this teamplay is much more effective