Every Yasuo I've played against has been a negative asshats.
Went Trynd mid this last game because I was against a Yasuo, he grabs first blood on me and proceeds to say-
"lol trynd mid, gg ez"
I hold my tongue because I'm running crit damage runes and I know what's coming...I get my statik shiv....and take his ass to pound town.
All game long everytime one of his team mates messed up or one of us killed him he would come unglued.
"Kill yourself, please do it, I hope you kill youself." All game long, and this behavior is something I've seen from almost ever Yasuo that I've played against or I've had on my team.
So it's official Yasuo is the new Riven and not because he's annoying but because his playerbase is full of angry Keemstar players.