Bissinger says he found positive and negative consquences to odessa's football-crazy culture. What were the positives and what were the negative?

I believe the quote below answers your question;

Athletics… ends for people. But while it lasts, it creates this make-believe world where normal rules don’t apply. We build this false atmosphere. When it’s over and the harsh reality sets in, that’s the real joke we play on people… Everybody wants to experience that superlative moment, and being an athlete can give you that. It’s Camelot for them, but there’s even life after it.