First of all - we're only getting one side of the story here with regards to her initial consultation with the surgeon and scheduling of the surgery. She appears to have received the appropriate standard of care for an elective procedure. I will say as a health care provider, there are absolutely unpleasant, demanding patients - period - and that their side of the story is seldom accurate, in how they choose to interpret and recall events. The limited amount of information compared to a physician with which they have to comprehend many of the events that take place alone renders their interpretation shoddy. A single day in a clinic will make this abundantly obvious. I don't think things should be taken as a one-way street in which one party can be rude and demanding, and the other must comply.
In regards to the operation, I don't think they necessarily should have said all of those things, especially the "Precious" comments, which could be interpreted racially. That said, I think we'd all be pinned pretty badly if we were recorded speaking "behind someone's back". With regards to non-medical talk going on in an operating room, anyone who has been in their share of surgeries, ie any third year medical student or higher, or nurses, or surgical techs etc - knows the monotony of surgery and the frequent small talk.
With regards to her allergy, that also seemed common-place and not necessarily egregious, at least given the limited information we know. I can definitely see the information she gave as being reasonable doubt for whether she really did have an actual allergy - and the "test" they spoke of seems to be the standard of care as far as I know. I don't think she was in any real danger there.