Bots, AFKs, and Intentional feeds.
I'm not sure what you're trying to do Riot but it's not working. I just had 5 games in a row, Intentional feeder. 2 afkers, 1 bot that amounted to an afk intentional feeder. And a troll spouting homo-phobic bile the entire game. And I have to accept that your mod will probably go "OH he reported 5 players in 5 games he's just a whinger lets not pay any attention to any of them". When the community has gotten tot he point that you can LEGITIMATELY report 5 players in 5 games and it's NOT an abnormal day. You need better policing. I don't know .. put in some trusted players/accounts at various levels that can just insta-smite or something .. put in more people to actually "take action" instead of just "ho hum" .. do SOMETHING or you can kiss casual players goodbye and that's not ever good for a game.
I'm sorry if so many of my posts come off negative. Like many outside of honours and in-game "well dones" I don't feel the need to come onto the forums much unless I have a problem. And Riots continuing non-effort to de-toxify it's player-base is an ongoing problem. It makes barrens chat look like a church group.