Reward the positive players in toxic games
Honestly, in my opinion, the most positive players are the ones who stay positive when there is a toxic player on the team. Rewards need to be handed out to players that are positive in negative circumstances.
Since most toxicity is an escalation of a supposed offense, we should be rewarding players that don't let thing escalate for them.
What i think should be done is in any game where one player was verified as toxic by Riots system, every other team mate that didn't get reported as toxic should receive an ip bonus of some kind. This would motivate people to stay positive instead of retaliating when provoked, which is probably the biggest issue that i notice.