I know. What I mean is that your hidden mmr would be in plat if you're playing in diamond and losing a lot per game because the RR system wants you to be in a lower rank that it thinks you belong in.
All I know is that I match/team mvp like 6-7 out of 10 games and the game will still sometimes somehow think that I belong in plat lobbies + less rr gain per win and more for each loss.