Won all promos, placed bronze.

First off, I didn't win all my promos and get placed bronze, it's just the basis of what I've seen. A lot of people complain about winning 10/10 promo games and getting placed 1 or 2 divisions lower than the season before. That math doesn't make sense, but do wins matter as much as your individual stats in a match?

If you win 10/10 and get C and B ranks for your grades, that's not going to look as good as losing 10/10 and managing S grades every match. Not sure how it works, but that's what makes sense to me. Some people can get carried through their promos, and because of their individual effort end up somewhere completely different than who they played all their promos with. Assuming that they both finished in the same div last season.

Any feedback on this?