Oh sweetie~ I'm sorry.

It totally sucks to pay money to a professional in good faith that services will be rendered professionally and then have it turn into a frustrating situation whereby the professional seems to not be listening as well as not explaining procedures prior to them being performed. Again, I'm so sorry.

The great news is that you have had the fecal float performed and now the snake can obtain appropriate treatment for the parasites and start to gain weight

As for the tub/caging issue, I would choose to not allow it to get to me. You have the vet's opinion and you 'know' your snake. Keep an open mind, and also continue what is working for your snake now.

Lastly, always remember that you can choose to go to another vet. You could also choose to make an appt with this vet for a consultation that would permit you to voice your concerns to the vet and perhaps the two of you could arrive at a solution that you feel comfortable with.

Take care. Good luck with the snake.