Broken matchmaking point system

Is it me or is the system for awarding points completely broken? You can gain like
3-5 points for a win even though everyone in the game is right around the same CR but you lose and you lose like 11 points at least. I literally won 3 games and lost 1 and ended up with 2 positive points from all that lol… Just a vent I guess I will continue to play it just frustrating.