Why does everyone care about Yas?

I've got 2000 hours on this game, and Yas frustrated me when I first started playing, sure, But after learning how to beat him, and starting to learn how to play him, it's like.. why? If yas can 1v4 your team, you either played really poorly, someone fed him but yknow that doesnt happen with any other champ , or he played impossibly well. Good yas players are insane to watch, and almost impossible to beat, but every moderately high skill cap champ can be insane to play against in the right hands. I'm an amazing katarina, and I've got like a 75% win rate with her in ranked over like 40 games, but that doesn't mean it's not hard to do, its not like i havent dedicated time to being great at that champ, and there are other champs that just single-handedly win the game with 5+ kills. Sure there's counter play, but usually that counter play is dont feed them. It's fairly similar to yas. He's a lane bully sometimes, but if you've ever picked him into darius, you'd know he's not actually that insane as a champ. his early damage is fairly shit, and his abilities do almost nothing to help improve that damage except giving him an auto attack reset. He's just a champion, like everyone else. He's fun-ish to play, he's not impossible to beat, and the games you have with him can be extremely interactive. I remember one game I flash to the right of him as he win wall'd to hit my full combo as lux and that was so fucking satisfying that it hurt.