I have losing PTSD, so I get what the OP is saying. Getting so caught up in fandom that the football or hockey content isn't as important to protect myself from the inevitable. I expect disaster but hope for none. That's a peace I made with myself after the 3rd Superbowl loss. I also witnessed the Syracuse Orangemen win a national championship and it wasn't as big a deal as I'd made it out to be mentally after supporting them hard during the 80s and 90s.
I'm in the "no matter what happens, this is fun" camp. I fear the darkness that will come if the team doesn't meet expectations.