Reports
This games concept of reporting behaviour is the most incredibly unpleasant part of any game I have ever played in 20 years of gaming. That the report button is right there next to each persons name at the end of the game, and that it is easier to click report rather than honour sums up the entire game. I literally do not go a single game without someone saying "report XXXX for XXXX" and 99 times out of 100 its a nonsense reason. The ONLY thing I ever report is AFKs and the obvious trolls who run down mid going 0-25. There is no excuse to report people for any other behaviour. If someone is saying things you don't want to read, click mute. I really think the report button should be removed from the post lobby screen and be turned from a 'report anyone you feel like' button to a report those who genuinely spoilt 9 peoples game and shouldn't be allowed to do it again button. As it is at the moment its like we are being promoted to be toxic to eachother.
I wont even recommend LoL to friends because of how vile the attitude in game is. It would be embarrassing to me to show others the atmosphere of the game I play. The only way I can enjoy the game is to have music blaring and mute anyone who says anything even slightly negative.
PS- having the S+ grade system have actual rewards is the most toxic thing you could have done. Now even in ranked supports will killsteal (with good reason) and fed players will avoid teamfights to keep their S grade score intact. So many bad decisions taken in this potentially amazing game. Sort it out.