For me, I enjoy sports for what it is... a nice distraction from life for a few hours. Oddly, I think knowing way more about the sport than the average fan actually makes it easier to let go of bad results most of the time.
Yeah, it's frustrating watching a half-billion dollar dumbass play like a replacement level scrub, but I still have to go to work/school/practicum tomorrow whether he hits well or not, so ... his failures or successes, or team failures or successes really don't matter to my life. When this kind of thing bothers people to the point of screaming at clouds, just turn it off.