I agree. Just look at Worlds. Faker had a 100% win rate with Ryze. Think about that. In a tournament of the best players in the world, Faker was able to win every single game he played with Ryze. He was pick-ban the whole tournament.
@Leo1024
And the thing about Yasuo is that Riot doesn't think he's overpowered because everyone who plays him plays like an absolute animal. He's such a strong champion that it's almost impossible not to feel like you can 1v5, and sometimes you CAN. Riven in the early days used to be so busted that she was the same category. She just had to much value to her kit that it was almost impossible not to feel like you could destroy the world with her.
This "animal" mentality is what artificially brings winrates down and makes stats look lower than they really are. I played the very first game I've ever played as Yasuo the other day and I legit did nothing but faceroll and I got a triple kill on tanks. You can essentially play him with nothing but his Q and auto attacks and he'll out DPS pretty much any champion in the game. And with a Bloodthirster, you're almost as unkillable.