people deliberately afk matches to drop their mmr while they not only ruin matches for other players but also ruin other’s team rating / pips.
i suggest that you finally implement the afk report option and if the same person gets reported multiple times by the majority of the players in a match he gets a 48h timeout.
to prevent trolling every player may only report 1 person for afking in a match.
Ex player of PeanutButterJellyTime, Heavenly Annoying and Visceral Gaming.