Please read this important disclaimer. It sounds like you are not getting very good rehabilitation. Perhaps this place doesn't have the expertise to deal with the medical conditions and therapy needed. This place sounds like they are more interested in wasting time arguing, meddling in family bussiness, milking medicare, putting other professionals down and doing the least amount of work.
Nurses are only able to carry out orders.
Although your father is 92, he still needs rehabilitation and shouldn't be discriminated against because of his age. I would be surprised if the facility he is in has a license to do ventilator weaning and rehabilitation. The reader is advised to always seek the advice of their physician prior to changing any treatment or to receive answers to questions regarding a specific medical condition.