I see what you're saying. At least she's doing the right thing now?I agree, at this point its too late the dog needs to be rehomed. But its obvious from reading the description that the dog has severe separation anxiety and general aggression "we need a hermit who never has people over...."
To me it sounds like an unexercised, untrained BC that developed temperament issues. I would be really suprised if it turned out she runs him an hour a day, has had behaviourists in to deal with the issues...