According to lolalytics, Yasuo's win rate vs game length features a M-graph, where his win rate is high at both the beginning of the game and the end of it, while his mid-game is where his win rate takes most of the tank.
This is very easy to see why, because Yasuo's kit makes sure he has one of the highest possible damage scaling in the entire game (passive, Q, R) so that naturally makes him super strong in late game, no questions there, but also because the fact his kit is also a combination of both low-CD infinite range poke (or just low-0 CD in general), infinite in-lane mobility, windwall on a basic ability slot that blocks most of the spells in the entire game and with a completely broken coding that blocks shit even if Yasuo is ALREADY HIT by the attack and even if the wall is shot in the COMPLETELY WRONG direction of the incoming attack, in-lane poke immunity, free turret dive safety net in R because reasons that Yasuo is exempted from taking actual risks when diving (oh wait, Akali too, another CertainlyT champion. Oh gee, Zoe has that as well after 6, too! You seeing the fucking pattern yet?), 0 resource cost and other reasons contributing to his infinite in-lane sustain, extreme waveclear, extreme zoning potential after 6, and power spike into his "late game" from 1 finish item and possibly the cheapest first finished item there is in the entire game....... And anyone wonder why his M-curve win rate vs game length happens? Or anyone is trying to defend that this isn't the case for the longest time already?
I mean, what was Riot even thinking with a champion with an insanely overloaded and weirdly budgeted kit like that, that it's going to have a bad early? Did they really think a kit filled to the brim with free utility at absolute 0 cost nor barely any downtime whatsoever that conveniently has a monstrous high scaling factor, is really going to have a standard power curve of a hypercarry?
Well, maybe that might actually happen if Yasuo is actually forced to interact with their opponent in early game with his lowered base stats. But as it stands, he doesn't need to at all because he just spams from range like Ryze except without the extreme early-game mana gating, while sporting infinite times more mobility in lane and 10x the early-game waveclear power as well as having the shield being free. So i gotta ask, what did they think was going to happen?