The snowball in this game is really bad? Or is it matchmaking?

Here are the stats of my last 4 games, one team is always stomping REALLY hard. And if I'm being completely honest, I don't think it's the snowball itself, but the matchmaking. The skill disparity is so obviously huge that you can't help but blame matchmaking. It's like finding gold players in diamond games and vice versa.

Thoughts?