I have read all your posts on this thread @Lliria, but I got too fed up with the Mumsnetters who were trying to make you feel awful, and putting the blame on you, to read all of the PP's points of views. So I hope I am not about to say something that has already been brought up:
Any matters like the OP is talking about here, should be dealt with by the Practice Manager, and not be talked about - at all - during a medical appointment. The GP was totally in the wrong - for various other reasons too - to mention it at all to his patient, unless she brought it up first herself, and even under those circumstances, he should not have responded in a negative fashion.
The Dr/patient relationship (above any, and all other, professional relationships) must always remain professional, and be one where the patient must always be able to trust and feel safe when talking to, and being treated by, any doctor, whether that be her own GP, or a random doctor in something like an A&E situation.
Good luck with getting a positive result Lliria 🙏 My GP's surgery sounds scaringly similar to yours, maybe even worse... 💐💐💐