AFK's in ranked

Afk's in ranked. We've all come across them and frankly, they suck. It's impossible to get promoted when 50% of my games are ruined by someone being afk. There's an easy solution: if someonefrom goes afk or leaves the game for over 2 minutes then the result of the game doesn't count. It's such a problem that it's basically making the game unplayable for me. I quit for a few months out of fustration, come back and it's just as bad so I'm quitting again. That means no more spending on new skins or champs, sorry Riot. Urg, fustrating.