Mesa is indeed a pretty nasty place to be, if any of the line pilots I know there are to be believed. Another problem with Mesa that a lot of pilots in our position don't consider is just how universally reviled the company is in this industry. We're all just trying to chase flight time here in the regionals, but if the guy on the interview board at "Goal Airline #1" has a problem with the company for which you used to work, you could be dead in the water. Just ask any of those poor bastards with "GoJets" on their resume.
I'd avoid PSA, but you really should take any other job over Mesa. If you've got a burning need to fly your ass off for virtually no compensation, GLA's hiring. Sure we're ghetto, but we fly the routes nobody else wants in equipment that's not even considered competitive with the new RJs, so it's hard to accuse us of "dragging down the industry" like some other companies. We're proud of our place at the bottom of the industry, and Mesa needs to get the Hell off our turf.