I play yasuo as main, and I get killed every time warwick ganks, cause he's damn fast... How should I play against warwick? I know he is a squishy champ killer, but he seems too op to me, giving me cc's the whole fight and killing me even if tower diving....
Have you tried actually warding your lane
Ward. Dont overextend. The way you deal with ganks as any melee champion.
warwick has this mechanic called blood hunt. It basically gives away any time he is ganking. Pay attention to it and you'll never get ganked by a warwick.
I'm also interested in learning WW's weakness so that I can overcome it.
Grievous Wounds by mid game.
I play yasuo as main, and I get killed every time warwick ganks, cause he's damn fast... How should I play against warwick? I know he is a squishy champ killer, but he seems too op to me, giving me cc's the whole fight and killing me even if tower diving....
For playing against Warwick, I read that Yorick, Swain, Kayle, Renekton, Udyr and Olaf are good choices. But you play Yasuo, so the tips I found are:
Try getting a quicksilver sash to break free from his ult. Or keep your knock up/flash ready to set him back a bit to help with your escape. Ignite can help reduce his healing factor. Same thing goes for Grievous Wounds items. Also, if your jungler can counter jungle him pre-6 then that would set him back greatly. It's all about the teamwork here.
yasuo in specific? no idea.
generally 
