The community causes more balance problems than Riot
People whine about Elise and Zac being weak today, and forget that their endless whining directly caused these champions to be nerfed to the ground.
It's so fucking ironic people are using their low win rates to justify them needing buffs, because before each of their latest nerfs, Elise and Zac were at 45% and 47% win rate respectively. But what did the community say? "WIN RATES DON'T MATTER RIOT! NERF!"
So Riot nerfed them. A few month later they have 1% pick rate and 42% win rate. Now people turn around and goes "WTF Riot! Why are they so weak? Why are they so weak compared to XXX? Why don't you listen to us?"
And guess what? What does the top 3 champions whined about today, Lee, LeBlanc, and Zed, have in common? That's right, they all have 46% win rate.
You ever wonder why Riot doesn't nerf these champions? It's not because LC$BigPlays, it's because they have learned that the through Elise and Zac that community doesn't know SHIT when it comes to balance.