I mean,every champion in this meta is playable and not a troll pick:)
Take jungle for example.I can;t find a single jungler that is not in the meta.You can play what you whant.
Why are people complaining?Maybe because people whant to vent in game and they can;t do to the fact that they can get punished:)).
And it's normal to get some relief on your frustrations.
But as far as the game goes.It's really balanced atm.Sure there are a few champions op.but do you whant to play against old kassadin,katarina,akali etc. this guys could solo carry games:).
Even if darius and fiora are op right now.They still have their weakness.So it's manageble
this is my opinion.As a jungler i can play everything and i'm happy