Plz nerf Kayn and Graves

I'm tired of banning one and the other being played. These 2 champs are just beyond broken. Kayn literally can get 1kill and snowballs it automatically into a win. Nerf his ult by halfing its duration to allow more counterplay. Graves can just powerfarm and be lvl 18 before anyone hits level 11. Hardly any counterplay since he has dash, slow and is range. Please wake up and nerf this instead of just allowing it to be top tier for 1 year. Bans should be about champion you personally don't want to face and not predefined to must ban champs. Thx.
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