Well here's a thought. You may be here to play a certain champion, but everyone else is here to play league of legends.
If you getting to play the champion how you want interferes with everyone else playing a fair, fun, and interactive game, then you can go pack sand.
I haven't seen new Kayle, but old Kayle blew dick. Her kit was so badly designed, that the only way she could be even remotely balanced was to just get numerically dumpstered. That champion was so unfun to play against.
You either did nothing, and she was useless, and you won the game doing nothing.
Or, you made a.mistake, Kayle got ahead, and she massacred everything while invulnerable and there was nothing you could do to stop it because the champion was "balanced" around not getting a lead.
Learn new Kayle, learn a new champ, play League. If you're here to play Kayle of Legends, then you're not who they're designing for, and shouldn't be who they're designing for.