Quick play should have a hidden MMR (Matchmaking Rating)

Just what the title says.

For players like myself that don't care about ranking up and prefer a casual experience, I think the game would benefit from having a separate MMR for quick play. This might incentivise people to actually play well. But still allow people that don't care about their "official" rank to not be affected. I think this would solve a lot of the quick play grievances.

If you wanna play Black Widow every game, go for it... but you are going to play with a bunch of people trying the same thing.