I am an Controller Main and get at least 10 Assists every game.

I am playing my role as I am supposed to do and help my team to win the game.

At the start of an Act individual performance counts a lot into your MMR. And since I am at the bottom of the scoreboard (even with 10+ assists), my MMR is ruined and I gain less RR.

How do you tackle that problem?

Edit: It's not that I play bad! I make round winning clutches or important kills but the only reward is the quantity, not the quality!

Edit 2: I am Immortal and not some kind of low-elo complainer. Profile.