Reddit in a Nutshell: League Boards Edition
2016 Season Update: New Champ Select + Client Update + Chests/Key
So HYPE.
Why do people dislike the chest and key system? It's literally entirely optional to pay for it, is accessible for free, and can net you paid content permanently. Who cares if you sometimes get a rental for a champ you don't play, or get a skin you don't like? You got it for free.
If your sole happiness from playing the game was to grind out chests, you're probably playing the game for the wrong reasons.