This hate boner for Kai'sa is honestly a little ridiculous. The champion isn't problematic. She's weak where she needs to be and strong when she's supposed to be. She does well in Worlds but common soloqueue is not Worlds. In soloqueue, she's getting assfucked by the plethora of other ADCs who are far stronger along with a lot of other low range, late game carries(Kog, Trist to name two specifically). She's got the the 4th lowest winrate this patch according to OP.GG: https://na.op.gg/champion/kaisa/statistics/bot
Her pick rate is high but that 100% is more inline with the idea that she is just fun to play. A high pick rate and a sub 50% WR just shows people enjoy playing her even if she's bad. She's like Ezreal, who literally has the lowest winrate but also has a huge pick rate. It flat out does not matter how much she is nerfed. She will still be played because she is enjoyable to play. She has satisfying gameplay.
But continue to hating on a champion who is bottom of the barrel strong because you lost to one in your game.
Meanwhile, Jinx has been strong since the start of the season; no one whines about her AoE critting you from 700 range starting at level 9. Or Ashe who is literally the second highest winrate champion in the game. That's not even just bot lane. That's in the game as a whole.
I don't even play Kai'sa. I'm just tired of people whining about a none problematic champion.