I don’t even know where to start on how wrong your understanding of the process is, though.
It’s a continuous variable… there are no “baskets” as you suggest. You play the same players all month long regardless of rank.
Seven losses isn’t going to move your MMR much if you’re a long time player. It just doesn’t matter to the long term data set. The more games you play, the less volatile your score becomes.
And there it is, like I said in the other topic. You don’t care, you’re just the expert.
You’re just flat wrong, but okay.