As a rule, gamblers are dumb.
If you don't like a game, don't bet the game. Hanging out with a buddy of mine, we picked some games and called his bookie. I won my 3 games at 1 PM, he split his 4 picks. We looked at the 4 PM games and I said "Yeah, I'll pass. I don't like any of these." He couldn't believe it. "But you're up!!! It's house money!! How can you not bet?!?!?!"
Word was he had to leave town because he was so deep in debt with his bookie.