I love what this game has become

Just got into a game and the first thing that happened was that a TEAMMATE banned the pick of another one. And obviously the second guy and some unrelated person decided to troll. Dodged it, but that is not the point of my complaint. The point is that this game is plagued with mass toxicity in lower elo and sometimes in higher as well. Is there nothing to be done about that? Would be great if someone actually did something about this, because it is impossible to report someone out of aftergame screen and even if there was i doubt that Riot would have the "time or resourses" to be checking every report. I do understand that but it is never the less annoying to be struck with the leaver buster because of someone else...