I don't recal Yasuo being hated and disrespected a few years ago
Maybe I'm mistaken, but Yasuo use to be regarded as a difficult champion to play but one which had a high skill cap that was rewarding. He was more of a scaling carry, maybe not the best early game.
All that seems to be reversed now. He's everywhere. He's faceroll. He does everything well and is easy to play. But people still feed on him because they are bad.
With the way the game has changed, it seems like he's just stronger early too. Like an ADC he gets his items sooner.