Most OP complaints are irrational
Recently played through bronze and silver and something was made very apparent to me.
People at low elo (really below diamond or upper platinum) value the strength of champions wayyy too much. What I mean is that while certain champions are strong, (ahri, graves, Lee sin etc), they completely ignore the fact that at any elo below diamond, skill is more important than anything.
Exqmple, player A picks ahri, player B picks mahlzahar and player B proceeds to beat player A like they stole something. Player B makes better calls, itemizes accordingly and uses better positioning and player B wins the game.
This is because player B has been playing malzahar for a long time and is very familiar with how to play the champion in all situations. Player A took flavor of the month pick and got reamed for it.
The idea that only a few champions are playable is stupid. Jungle diversity sucks but there are more than 3 or 4 good picks in the jungle still. People that say otherwise are exaggerating and being babies.
In short: Get good at champions and objectives and stop crying for riot to make all champions have the same relative power, its never going to happen because they are fucked in the head. Adapt.