Riot here are some statistics for you from my games
So I don't claim to be great, I'm not pro on my other account I was gold V so I understand I'm not that great I'm ok with that.
Now I start another account, I get placed bronze with everyone else no big deal right good players climb bad players fall no excuses is what I have believed. However there is something to be said about this. I kept track of the number of times I have had afks and been trolled ( and I mean trolled as in a player doing something intentionally to make the team lose with full knowledge it will make the team lose out of spite. Not a person feeding, making a mistake or having a bad game). To date I have had 153 games with people trolling and 120 with afks. I also am not raging them flaming them I'm trying to be the peace maker or say nothing at all. I carry some of the games, some it so hard I just am not good enough to. Yes to the flamers I know get better. However that many trolled games and afks do affect your ranking heavily.
Here comes the down votes and flamers.