PVP is a competitive format, you're competing against someone else for victory so of course it has to show you just how competitive you were! If your win ratio was over 90% you'd be pretty annoyed if that was removed.

If you want to slowly rank up, skip the level 50 matches, 30/40 has no possibility of players having morale+ gear (it resets it to 0) so people running around those matches with PVP gear are more than likely not running an optimal set up, gear wise.

My win/loss ratio does suck, but I don't want to get rid of it because eventually I want my win/loss ration to not suck, it's something to work towards.