Someone tell me what Yasuo's weakness is

Well designed champions have strengths and weaknesses. A champions weakness is something about how they work that, if recognized by an opponent, can be exploited in order to try and get the advantage over the enemy. Even in the hands of a good player, a champion should have something about the way they work that can be capitalized on by the opponent.

So someone please for the love of fuck tell me what Yasuo's weakness is. Insane mobility insane damage hypercarry with free crit chance, free 50% armor pen, poke, shields, a knock up, low cooldowns (his ult is on a 30 second cooldown at max rank before cooldown reduction, and a game changing basic ability that could probably pass for an ultimate ability on a support if it was tweaked slightly.

"Just hard cc him, it stops him right in his tracks!"

Hard cc stops everyone in their tracks. Except for the select few with built in spell shields or cc mitigation in their kits (Gankplank), being hit with hard cc is considered a weakness. You can't just take the one thing that affects 95% of the character cast and call it a weakness. That's terrible design.

This champion needs a rework. This champion is not healthy for the game.