The only main problem I have with Ranked is the AFK system. I was pleased that Riot implemented a remake option for the start of games, but in lower Elo it can be extremely frustrating when you win lane, roam to get your team ahead and then one player decides to leave for whatever reason. In cases of AFK I believe that LP should not be awarded or lost.
It may be a controversial opinion but I think in the long run it’s fairer for all. The counter to this is that well some players may leave intentionally if it’s a losing game, but that’s what the Leaver Buster is for.