I am glad to hear she is doing better, a good shed really does help with issues like your snake is having and most of the time a you won’t notice a difference until a shed, you vet should have explained this to you. As a veterinary professional I am truly sorry for the nonsense you had to deal with at that clinic, there is no excuse for that type of treatment especially if there is another veterinarian who is comfortable treating reptiles. I would look for another exotic vet in the area if I were you once Nico is doing better.