Why I have a problem with people calling champions OP (zed, leblanc, nidalee, etc)
I don't really care if someone shares their opinion, but when someone has 100-200 normals games, barely any ranked and has little game knowledge then it gets me salty like saltopia. Trust me when I say this, this game takes a while to learn; one day you can think master yi is OP then you will keep gaining knowledge until you can finally think reasonably on what is OP and what isn't.
Another big reason is because most people with that little bit of experience will become sheep and one day say "x champion is OP" then switch to "X champion sucks, X champion is now OP"
tl;dr experience is key