Yasuo Mains are probably the ones who deserve the most sympathy.
So just imagine you decided to main Yasuo because he was fun.
You'll have to endure all the shittalk you're getting just because you're picking him, coming from both your and the enemy team because the champion is just so god damn toxic. The champion being toxic also makes it so that you will rarely even be able to play him because he will either get banned, picked by the enemy team or counterpicked by the enemy team. All the while mains of other strong SoloQ champions, some of them might even be stronger than Yasuo like for example Sion support, can reign freely without having to worry about bans or shittalk. Even if Yasuo is just mediocre he will get banned just because he is such an annoying pile of shit. You'll also get less recognition for good plays or on how you mastered one of the most mechanically intense champions in the game because not only does bias make you a supposed noob for playing him but there are so much other Yasuo mains out there that most of the other players will probably just be used to seeing them.
All of you guys out there, take the champion you are maining right now. Now imagine, you will only be able to properly pick him in like 1/4 of all games and when you do, you are automatically an unskilled asshole no matter what you do or say.
Yes, it feels terrible to be playing with or against Yasuo or having to ban him every game, but being one of them is probably so much worse.