Punishment System
The punishment system in this game is extremely broken, and does not advocate for proper behavior within games. I've had a toxic teammate in 99% of my games and yet nothing changes, I queue up, get put with another toxic teammate each and every game. Not only that but there are players that feel the need to be toxic towards the other team too, with mocking, harassing, talking down to individuals, saying "ez" after a win. Riot has absolutely lost control of players behavior in game, and the system in place currently is not cutting it. A player can mock, harass, and be negative towards players, but the instant the victim of the insults stands up for themselves Riot punishes the victim rather than punishing the aggressor. I've been called every name under the sun, had people intentionally feed, steal jungle camps to troll, quit, give up, and spam surrender in nearly every game I've played, yet that will happen again and again in every single game I queue up for a new match-made game.
When riot does consider reports the chat logs are taken out of context, and given no sincere consideration for the circumstances. Chat logs that may not even be toxic or negative can be subjected to "negative behavior" even though player intentions are never taken into account. Subjecting a player to a "toxic" label as opposed to being an objective 3rd party is not improving the community. Riot loses sight of the people that keep them in business, their players. Are players valued and treated with respect by this system? Not at all. This company has some serious soul searching to do and should reevaluate how it handles in game toxicity.
Riot, the first step is admitting you have a problem.