I respectfully suggest that if a GP suspects a complex and on going condition, like type 2 diabetes, for example, they schedule double appointments, meet their patients over several appointments, and see that all relevant tests are carried out.
I do not think anyone is suggesting that such treatment and diagnosis takes place within a single 10 min appointment.
Taking one look at us, telling us the problem is we are fat, and dismissing the possibility of other health conditions is not on, time constraints not withstanding. There is no excuse for a doctor to state they cannot do their job properly. They are either doctors, or they are not.
My mechanic spent more time checking out a problem with my car than my GP did checking out my health, despite numerous obvious symptoms and research by me, because I am fat, and menopausal, and a woman.
It is not my job to make my GP do their job properly.