Gloating because the team that gets more attention is out of the playoffs makes you look petty.
I'm going to start off by saying this: be a fan of any sport, or any team that you want. Don't be a fan of any sport, or any team that you want. Hate whoever you want. Don't hate whoever you want. Sports are weird, and they breed weird loyalties, they breed weird contempt. I irrationally hate the Atlanta Braves with every fiber of my being, because they are a wonderful place to project my resentment at moving down here as a child (and the fact that I inexplicably remain).