It's 2016, when does this stop?

After losing 4/6 games today to afks/trolls (feeding intentionally, sitting in base typing), I really have to ask: when are we getting the ability to just remake a game at any point? Why can it only be before 3 minutes and then we're basically screwed? Losing AND gaining mmr because of a disconnect is a horrible feeling and doesn't help anyone as players and ruins the point of the game. I've played 2000 games across the past two seasons to try and get to Diamond 5, and now that I'm here, I'm basically playing so that I don't get demoted (which isn't going so well when I get a bunch of afk's at 0 lp). These people are causing me to lose mmr at a rate I otherwise wouldn't be and it's completely unfair. When do we get to remake when someone leaves past 3 minutes? You're going to tell me that because of a situation I can't control I'm the bad player? There's no way to outplay a disconnect; we get condemned to lose lp/mmr. I'm playing the ladder to try and be a better player, but there's nothing I can do when my team stops playing and it kills motivation. Trolls are harder to deal with, but why should we have to lose a game when it's a 4v5? 5 always outscale 4 unless you've got a huge lead pre-20 minutes and can hope for a reconnect, and even then it's really difficult for the 4 to keep up. Why does Riot refuse to solve this issue? People can't abuse it if you don't give either team a win or a loss after the game -- then nobody could climb the ladder.