Eating disorder is often comorbid with what's called "personality disorder" (usually what's called borderline PD).

People with that label experience significant levels of stigma and discrimination from health workers, including mental health workers.

That said, it should not be underestimated what an immense strain those people are on mental health workers. I wonder how much time those institutions dedicate to debriefing their own staff, I think that would make a big difference in how the patients are treated as well.