If you are not happy with her and yes she sounds like she came across as unprofessional and rude ask to see someone else you're comfortable with, this is extremely important as you need the appropriate aftercare to succeed. She was seeing you at that time and not others and should NOT have been comparing you to others. Her job was to listen to you and if there was something you were doing wrong then help you figure it out in a professional way. She needs to understand even though we are all on the same journey we are all individuals and what works for one person doesn't necessarily work for another.
When I've gone in to see my fill person regardless if I've lost 100 grams that week or two kilos she always is positive and her questioning and my answers and my progress determine if I need a fill or not. I remember when I had to get my second fill I had to see someone else as the first person I saw was on holidays, I felt so uncomfortable with that persons mannerism I made sure every appointment after that was with my first fill person who I absolutely adore and feel comfortable with.
Does that woman not also realise that stressing someone out can affect the band. Without you she has no job, she is paid to provide a professional service, you employ her not the other way around.
Please don't let her discourage you, just ask for someone else to do your fills. Someone you are comfortable with.