[youtalkfunny]

Q: Why are you playing there?

A: To show them what you're like.

I guess showing them what a know-it-all loudmouth you are hampered your prospects.

Hey, I used to be a young, know-it-all loudmouth myself. It cost me more than one job. Even cost me a promotion once. I grew out of it, eventually. You probably will, too.

EDIT TO ADD: This is just a wild guess, but I get the impression that you probably could not resist the urge to help the dealers run the game while you were there. Outside of outright stiffing, that generates the most complaints in the break room--and it fits in perfectly with the know-it-all attitude embodied in your post.