Let's face it - Yasuo is a problem, and not just Tank Yasuo
Right at the moment Yasuo averages above 60% winrate across the all regions with the E -> Q -> W skill order. - I just checked it OP.GG. And it is not just Tank Yasuo, if you check his core builds you may see something as ridiculous as almost 72% winrate for toplane Yasuo with PD -> IE -> BT in EUW. In NA the same build for toplane Yasuo averages at 73%. While it is understandable that players build these items when they snowball, and Yasuo is supposed to snowball hard - it is still above what I would expect.
I have faces quite a lot of yasuo players and what I've always felt to be his most annoying, unfair and overall bad mechanic is his windwall. Like really - this spell has the power of an ultimate, without being an ultimate ability. Just compare it with other champions' shields: Morgana's E protects only one member and blocks only magic damage, and only a limited amount of it. Sivir's and Nocturne's shields work for only one ability. Taric's ultimate protects potentially the whole team, but only from damage, while doing nothing against CC ones For 2.5 seconds, after 2.5 sec delay. At 160 / 130 / 100 seconds CD. Yasuo's wall protects potentially the whole team from both CC and damage, as long as they are projectiles, while doing nothing against non-projectiles. For almost 4 seconds. At 26 / 24 / 22 / 20 / 18 seconds CD. With 40% CDR Yasuo can almost negate so much of the enemy team for 3.75 seconds, every 10.8 seconds. Like... fair AF. And I am not even mentioning his double crit chance in a game, where AD stacks multiplicatively, because of critical hits. But nevermind this.
My suggestion is: Hit his wall. Is should block either certain amount of projectiles or sertain amount of damage. Or both.
Just my opinion here. Feel free to disagree as much as you want. That's what I have though while playing against this champion.
Thank you for taking your time to read and answer. Hope you all have a wonderful day!