Yasuo is super hard to play, that is why he deserves to be overpowered
Because clicking like a moron on as many minions as possible during laning and dodging all ganks because "meh mobility has no cooldown" is skill.
Because "it takes 3 hits from Q to use tornado" but takes like 2 seconds mid and late game to charge is skill.
Because a tornado skill shot on the most mobile champ in the game was too hard, let's make it an auto hit if he dashes to you is skill.
Because I get free shields to protect me from trade damage while i roll my face on the keyboard is skill.
Because casting wind walls to stop entire ults as an additional skill completely unneeded in his kit is skill.
Finally, having the only ability in the game that guarantees the extension of hard cc followed by massive armor pen for basically the rest of the team fight is skill.
This champ takes soooo much skill that he needs everything given to him on a silver platter just so bronzies can still dominate with him while challengers can rick roll everyone.
Oh almost forgot, 100% crit with 2 items, TOTALLY SKILL