Ranking Flaw.

Me and a team of four have ran into this issue multiple times now in ranked playlists.
Whenever we are winning a game and the entire team decides to quit out, obviously we get a win, but at the end of the match in the carnage report, we rank down for winning?
This doesnt make any sense, ranking down for people quitting out? And then also apparently, when people quit out, their rank is unaffected. There is no logic in this and if the ranked gameplay is going to continue, this should definitely be fixed.

I have a friend I was playing with and he experienced the same thing the team quit he went down… Either weird or stupid.?.?