1 implementation will fix this game
I am an avid player of this game and the only problem I see while playing is that Riot does not police their game nearly enough. This causes players to int and be toxic without caring because they know they will not be punished. I never thought Id say this but the community who plays the game are the ones ruining the game and not the game itself. If Riot really enforces good behavior by adding harsh punishments such as huge lp losses and lengthy temporary bans for inting and toxicity then people will stop committing these acts. This is just like why people do not commit murder or rob banks because they know the punishments are so severe. On top of this adding team wide voice comms and disabling all chat will prevent inting and toxicity as people will be unable to hide behind their keyboards when talking voice to voice. Not to mention team coordination will improve which will greatly improve game play.
Riot if you are reading this, this here is the fix that will revolutionize your game. Hire people at the company to police this game that will scour report request and re-watch game clips. LET THE COMMUNITY TAKE CLIPS OR PORTIONS OF CHAT LOGS FROM THEIR GAMES TO USE AS EVIDENCE FOR OTHERS WHO ARE INTING OR BEING TOXIC. That way you will not have to re-watch entire games to see where the foul play is. LET THE COMMUNITY DO THE HEAVY LIFTING FOR YOU.
I love your game guys but other people who play it are ruining it which is really hurting your product and hence your player count. I gave you the answer to solve all of this nonsense now it is up to you guys.
Good Luck, RedOpticToxin