I experience high toxicity in about 50% of my games. People hardflaming, people afking, or just running around to "cheat" the autobuster.
It's been like that for as long as I can remember and is the main reason most of my friends quit LoL. Riot made efforts with the honor system etc. but it simply doesn't work. Toxicity hasn't decreased a bit... at least in my experience.
I want harsher punishment for negative attitude and griefing! I understand that people may quit the game if Riot punishes them more often, but at the same time other people DON'T quit because of all the toxicity, or even come back once things changed.