On improveing the gameplay experiance.
A more rapid removal of highly toxic players would be ideal. I know a lot of automated systems are used. I don't feel its adequate enough anymore.
My suggestions on a few fixes.
Single game behavior resulting in punishments. I know this seems harsh but I think its getting necessary. A zero tolerance policy might be required, Look at how hate speech being cracked down on changed chat behaviors. The punishment for one person losing their cool and destroying the match, it does not have to be as harsh as a seven day ban. A 30 min que lock out might be enough. This is not for "bad games" but for clearly toxic behavior where there is obvious intent. If you think some one is going to get super tilted after a lock out, and que to throw more games, that's the kind of toxic player we don't need online anymore. They clearly lack the maturity to show consideration to teammates and opponents, they can gtfo, whos going to miss them?
5 reports get escalated to player behavior Rioters. When some ones got a majority of players reporting them, it should get looked at by a human to make the verdict on if they create a negative experience frequently.
In almost every post I read about some one Quitting league, the community being dam awful is mentioned. Hell its something that's hard to miss if you play regularly. Look, Some blame riot, some blame players but either way it is something that clearly exists. Question is what should be done to fix it. I feel a clear community stance of this shits unacceptable is a good start and would get dev attention that its something players care about. If you don't have the maturity to play a team game with the attitude of being a teammate you can gtfo, your a liability to fun and game health.