Yasuo isn't invincible when windwall is up...
There are some champions with moves that have almost no counterplay. Jax uses counter strike and is pretty much invincible. Tryndamere ults, becomes literally unkillable (even through HARD CC) and there's literally NOTHING you can do about it. When windwall is up, you have 2 options. You can either wait for it to end and fight afterwards, or you can walk through it and fight him (and his team). You guys need to stop pretending like there's no counterplay to Yasuo. He has more counterplay than most other champs in this game.
w
w
q
q
trashboxes
q
ult.
Just to name a few.
Heck, Veigar can be a real threat to him with e and w.