To be honest,this game need the mechanic that if the player who abandoned the match or afk for too long like 5 for 9 minute,the server will kicked that player out out and then banned them for 1 or 2 hours and ofc the teammate of that player in that match will not loss any elos point and they will get double elos if they win that match,it will helpful i suppose

https://steamproxy.net/id/devvek1ng/inventory/#730_2_14897275016