ShinVector, on 25 February 2014 - 12:33 AM, said:
Your mistake.. YOU SOLO PUGGED !!
Decent ELO ? Guess what.. All ELO MM cares is it wants players to have a 1:1 win/loss ratio.
You solo pug.. ELO MM says.. "Ahhh this guy has decentELO.. Here ! How about winning with 8 noobs in your team !"
ELO MM continues with evil laughter.

He pretty much said it right there.
The matchmaker puts together two teams...one it predicts to win, one it predicts to lose. If you're on the one it predicts to lose and actually win, then your Elo has a chance of going up. Vice versa for the other way around.
The problem with the current Elo metric is that it's got such a HUGE spread that it's looking for (1400 points). New players, after their first 25 matches, start off with a 1300 score. You, let's say you're a high-mid range player and have a 2200. That means that you could be playing with people that have an Elo as low as 800 (if that's even possible). That's basically your issue there, not much you can do about it.
That having been said, I'll quote Sandpit: "Your experience may not be the same as everyone else's." That means that just because you are experiencing what you interpret to be repeatedly unbalanced games, not everyone is experiencing this, I guess.
I, on the other hand, am there with you. I'm experiencing the same thing, over and over again. Allow me to be the first to welcome you to the "We're taking one for the team" club....we're eating the unbalanced roflstomps so other people don't have to.