jerseygurl
Not a new member
I think the most viable solution is to put her in her place next time she goes on about this. "I don't pay you to tell me how thin it is. I've lived with it on my head for 2 decades. I know what its like. I pay you to work with it. Can you do that because if not I can go somewhere else." I think that would shut her up enough for me to get in and get what I need and get out.
Do that and you risk losing the rest of your hair

Good luck OP