I rarely agree with hashinshin (because hes very biased) but hes right here
That champion just shouldnt be allowed to be viable, its just so bad for the game, probably top 3 worst designed champs in the game.
Broken hitboxes, counterplay mechanics removed, broken champion (and broken as in not overpowered, but broken as in literally not functioning correctly, within the game boundaries).
Edit : Btw you guys dont want a fun to play game, if you did you wouldnt actually come here and try to DEFEND the monstruosity that is the state of this champion, you guys WANT LOL to be a bad game, so quit complaining about it then that "this season is so bad omg" and all the other shit you guys love to say, you guys want terrible designed champs like illaoi in the game.