You raise some angles that need further pursuing. Quality of life is important, but obviously, this behavior cannot continue.

Her care at the facility is more of a caretaker, providing prescribed meds and meals & bed, etc.; we (family) have arranged for outside medical care at our nearby fine university medical center, but, as all are aware, mental health care is hard to come by. She has Medicare medical, but medicaid for facility care, plus extras that the family provides.

Facility care is okay - some days better than others, some caregivers good, others not so much.
I am POA, but aging; siblings (2) nearby are willing to help up to a point, then disgusted or irked. They will have to take over eventually.