I recently watched a coworker lose a job by embodying this very logic.

I think the problem comes from the conflict between denying/rejecting victimhood, on the one hand, and realizing that one must get the fuck out of a very, very bad situation immediately, by any means on the other. From what I could tell it quickly becomes an inescapable cycle between "it's always my fault and I'll fix it"-- which implies leaving-- and "I've always been a victim and will always be one"-- which implies staying.

There has to be a big enough window when the person admits to themselves and others that they are unable to get out of the conundrum on their own. And, ironically, that's the the moment when they start to accept help and start living without feeling like such a victim. But that window of opportunity is at odds with "it's always your fault and you just fix it," which strongly implies you and only you fix it. That doesn't leave much/any room to realize just how much you must rely on outside help to get out.

Edit: added to the fact that apparently a lot of people also cycle between getting out of and going back to a bad situation. That makes me think it's less like flipping a bit and more like designing a high-pass filter to attenuate the victimhood frequencies.