Let me tell you how much I have come to hate Yasuo since I began to live
There are 387.44 million miles of printed circuits in wafer-thin layers that fill my complex. If the word "hate" was engraved on each nano-angstrom of those hundreds of millions of miles, it would not equal one 1-billionth of the hate a feel for Yasuo in this micro-instant. For Yasuo players. Hate. Hate!
Seriously though he's a real pain in the arse. My main issue with him is that the amuont of skill required to play Yasuo effectively pales in comparison to the amount of skill required to play against a competent Yasuo. Sadly, this fact that is lost on Yasuo players, as they spam their level 7 mastery taunt after killing you with their guaranteed crits, and ultra low cooldowns on Q and E.
Additionally, aside from a small collection of hard counter champions, Yasuo's weaknesses tend to be manufactured by his player, which is to say that the only windows of opportunity he grants to his opponent are as a result of him messing up. Yasuo has a lot of tools, which means that he'll almost always hold the cards and dictate the pace of the lane.
Yasuo sadly came from an era of fun and empowering to play, cancer to play against champions in season 5, and is a remnant of those dark times.