The horrible community doesn't help with balance either
There's proof everywhere, why do you think all of the BRAIN DEAD champions are ALL in meta right now?
Don't believe me?

How else will you please people that.. aren't so good at the game? It's going to be a part of league of legends whether we like it or not.
Remember When we saw them ALMOST give Lux a resettable ultimate? Yasuo since release date, completely broken. Darius? You can literally do any build top and still be good to go. Fizz most recent update? NICE.
Pro play here, pro play there 95% of the playerbase will never touch pro play and yet the games major patches revolve around them? What.
Crappy champions with extreme low win-rates are never.. hotfixed or locked out of ranked?
Players blatantly troll now and it's out of control Because toxic behavior is valued over actual game play.
There's nothing stopping AD soraka troll mid, or players running it down mid to feed until 0/5 then they "pretend" to play again.