Riot, why?

For everyone who looks at the match, take a glance at the Rengar's KDA and items. Riot, he would one-shot our ENTIRE TEAM. My question to you all is: Why in the actual fudge would you do something like this to ruin your amazing game? I played this game for two years, almost three. Riot, I have been in bronze five within my level 30 experience. I've seen Fizz, Tahliyah, Draven, Yasuo, and now Rengar with their completely broken items, kits, and roles. Why on Earth would you do this stuff to the lower ranked players? There isn't even a purpose to try and improve your mechanics anymore, because any champion that requires a single push of a button and a right-click will instantly blow away any dreams you have of growing as a player. I have tried Lucian and Riven in order to improve some of my mechanics, however there is always a stupid, broken champion that beats my combos or strategies. So once again I ask you Riot, why would you do this to the META of League of Legends? I do deserve to be chat banned, yes, mainly because I can't handle the amount of random bull that happens to me and/or my teammates, and yes I do go AFK a lot because I try not to hurt myself physically or mentally, but please Riot. Bring the fun back into LoL again.

Thanks.