Why does it seem like Yasuo has so much favoritism

Not single one of his gameplay mechanics has anything that thinks about the other player.

He can dance from side to side in his wind wall to negate any ranged champ even in close range.

His ult is one of the highest up times in the game with a huge effect (gapcloser and aa enchancer) with an algorithm to place him outside of tower range if it can while also doing the damage last to prevent him from taking tower aggro if he is in it.

His passive was never nerfed when it was made possible for him to hit 100% crit chance with just 2 items without runes.

His MS is really high (345) for someone who is one of the most mobile champs in the game as long as he is around enemies thanks to his E which can also be used to set up an AoE ult and doesn't do reduced damage with the combo.

Riot you can't give him everything otherwise you are stuck with what he is right now. He is either really good or garbage with no inbetween.

He really needs his E Q combo to do like 75% damage while having his ult have a longer CD (30s CD with a 15s active on passive like wtf). His ult late game should at the very least be on a 45s CD with a 10s active). Honestly his ult needs to be made 80/55/30 -> 90/70/50 (still really high uptime late game considering most ults are 60s+ CDs) so he can't just kill you and have it up to kill someone else before you even respawn.

If you don't want to go there then nerf his E Q combo damage and his E damage should no longer get bonus damage but have slightly higher base damage and make his windwall have a cast time where it doesn't spawn from him but instead spawns where it normally would rest from him but after a small cast time of like .5s.

You can't tweak his raw numbers right now. You have to mess with his kit. His kit is the problem not the raw numbers. And until that is addressed he can never be balanced.