The whole MMR system to put equally skilled players together doesn't work well.
It's a good idea in concept, but poor execution. As of late, I've been getting matched with either people who are master ranked mmr (Hotslogs), and being paired with people who won 5 of their first 7 games (ever).
I fail to see how a new player with under 10 games played can be seen as competition for them, or as a competent teammate for me to try and defeat these "Master" players.