skill pts calculation question

I would also like to know if there is a calculation for losing to a higher GP roster or not.
I regularly come up against players with 8.6Million GP when i am only 7 Million, and have found when i play those players i lose less skill points. like i lost very little compared to what i thought i would and was able to stay in Kyber 2

There are no extra points taken/rewarded for how well you did in the match up. For example if you win by 1 point or if you win by 1000 points, they're worth the same.

There is some deviance based on the skill rating of your opponent. For example there are more points awarded for beating a 2700 player over a 2650 skill point player.

The round will probably make a difference (due to the next point).

The main win point changer though is 'squish' or divisional balance. The maintains a limited amount of players in a division. The heavy point being Chromium 3 (the middle). So points awarded or removed will always try to squish you into a division that won't have the required population for the next season.