Am I the only one getting sick and tired of playing against the same champions every fucking game.

I guess that is you because I do not see Lee, Caitllyn, Ezreal, Vayne, Jhin, Lucian or Miss Fortune every game. (Because they are in the same role) Pretty sure you are just being hyperbolic, in which case, please add Kha,Zix, Rangar, Akali and Kat to the list.