Eventually I quit and my position was replaced with a friend / associate of the owner's (whom he had been in discussions with prior to me announcing I wanted to exit).
I signed no exit paperwork on my way out. In fact no one said anything to me. It was the most bizarre (and worst) job I've had in the last 20 years.
Should I write a blog post naming names and if so what does it gain me? Should I just let it go? Should I apply for unemployment even though I wasn't fired?
Not much, maybe a defamation lawsuit if they find out about it and they’re sufficiently spiteful and petty.
> Should I just let it go?
Yes.
> Should I apply for unemployment even though I wasn't fired?
No, my experience is in California: the unemployment office sends the paperwork straight to the employer. That will be your former boss’s chance to (correctly?) accuse you of fraud and screw you over one last time.
Are there questions you should have asked in the interview that would have lead to a different decision?
Are there attributes that companies that pay at or above average are looking for in candidates that you lack and could work on?