Rant: Matchmaking Imbalance

So, I've been struggling through the mess that is solo que to try to get to Gold by the end of the season. Last week I hit Silver 2 finally, and won a pair of matches before beginning what I have come to expect every time I promo: A series of horribly imbalanced unwinnable matches. I would think that riot would have some sort of system in play to balance things if say, a player goes 2/12/3, or a pair of players post those scores, or a pair of players afk or feed intentionally and are reported. So that they would be relegated to being put in a sort of suspension temporarily or paired with players of similar habit as a sort of punishment, a way of keeping the good, fair, clean players away from those who have been toxic or negative to their teams. But sadly this is not the case. After posting a match history of 14-3 and burning my way through silver 3, I am now 3-10, demoted back to Silver 3, and while, being honest, a few (2-3) of those matches were guided to failure by my mistakes, the vast majority were a sense of "Their team is balanced, cooperative, and working together, while my team either has AFK, has a troll pick/intentional feed, or a slew of toxic players who couldn't care to win or lose and are only here to bring others down."

It's entirely frustrating, and ruins the main purpose of this game: Fun. This game is supposed to be fun. Whether you are playing competitively or casually, this game is supposed to be about fun. But an unbalanced matchmaking system, a lack of proper and effective disciplinary action, and an overabundance of players who patrol ranked specifically with the intention of feeding and bringing others down ruins the fun of this game.

As a side note, part of this rage comes from my most recent game. A thorough, team based victory in our hands, throw away by my mid laner and top laner abandoning the team silently, ignoring our pings and chat to get them to return, and diving bot lane on their own as we lost a 3v5 mid. They then proceeded to continue diving for bot lane and the full team pushed in and won our mid lane, took the nexus, and won the game from literally nowhere. The two players refused to acknowledge chat, refused to acknowledge pings, and in the post game lobby simply left immediately without a word. Tell me how a player is supposed to climb out of this elo when player types like that exist. With a malicious intent to lose games and bring others down? And the greatest joy? They are both right back in que playing another, probably doing this for another group of unknowing players.