This is nonsense. Fans sometimes go their whole lives without seeing a championship, and yet they somehow find enjoyment in sports. "Everyone who doesn't win a championship sucks" is a crappy way to live. Your choice of course, but it's a bit silly to impose that POV on everyone else.Every sport minus maybe hockey (I don't follow) has the entitled championship or bust mentality.
Edit: Especially the NBA. You're whole entire worth in the NBA is centered around how many rings you have. KG was a career loser until he got out of Minnesota. DeMarcus Cousins is a bum.
My first favorite player was Fred Lynn. Guy was a stud in every way. Five tool player starting in his rookie year. I'll always love him for inspiring my love of the game at a young age. No, I don't love him as much as Pedro and Papi. But if you think about it, but for a nice string of clutch performances by Pedro and many of his teammates over a nice four-game stretch in 2004, the greatest pitcher that I ever saw wouldn't have any rings either. If Keith Foulke hangs a pitch to Tony Clark (longest AB of my life), then that was that.
Hanging division championship banners is weak sauce, no doubt. But loving certain players and teams for their effort and the good times that they brought you over the years is totally understandable.