Mastery Points should NOT be affected by just a win or loss.
I think it's stupid that the amount of mastery points you get are determined whether you lost or you won.
What if that one person who plays terribly but still wins the game? Their KDA is bad, CS is bad, and they didn't do anything but get carried by their four other teammates.
Or, when you try so hard but the other four people on your team play really badly (hopefully not toxic) and you end up losing. Is it fair to get only 200 points for losing a game that you really tried on?