It *can* be fun when you lose, but only if you lost in an interesting way. A straight curb-stomp just makes you feel bad about yourself and/or your teammates. The dejection of the losing music doesn't help, tbh.
And the hours it takes to finish showing all the unskippable post-game stats. Just start the next game already!
I wish they were savvy enough to have an auto-queue toggle. Something like where it could match you up with players for another match during the post-game and then after it sends straight you into another game.