I had a family member some years ago who was also called
a liar for more or less the same thing. So this feeble old
lady stuck her grandson's voice recorder in her pocket and
SHOWED the unblievers that she was not just blowing
hot air!!
They agreed that she should change doctors right away,
and when she played it to the receptionest, she had to fight
to keep it!!!
As a long time hospital volunteer (28+ years) we all called
the new interns GITs. (Gods In Training), which was more or less accurate. An older doctor told us to give them 20 or 30 years, then they would realize they don't know everything and would become nice human beings.