[cessor]

Does your employer pay for your technical skillset and your labor, or do they pay you for sacrificing your mental health? I don't think self-care is unprofessional, and deciding to leave is perfectly fine.

Professionalism means being able to produce convergent results given varying resources, but when the spec is unclear, your employer doesn't provide appropriate resources for you to perform or if your mental health is in danger, I think it's perfectly valid to back off. "Professional" does not mean "sorcerer". A professional photographer can't take a good picture in complete darkness, and even a good architect can't create a distributed system when the environment won't support it. It argue it's professional to know your own limits and reject a job offer.

It's difficult to make the decision to leave, especially when you have been jobhunting for a while and I can't say anything substantial on how anyone should make such a decision, but the other day I found a meme saying (something along those lines):

In a job, you should either earn or learn; either is good, both is ideal, if it's neither: leave. If the job pays ok money, but costs your sanity, I'd argue you should leave.