Doctors that think they know it all? Do random bullshit checks that have nothing to do with what you are describing? Prescribe based on what they know and not want to investigate more? Tell you that you should go to the emergency room before analyzing at the problem while you're in their office?
Typically the actions of bad and overworked doctors, which you'll be more likely to find in... poorer neighborhoods! You'd think!
I don't go to a doctor more than once or twice if I feel their care sucks. I haven't found a good doctor yet regardless of neighborhood. Have to take care of myself instead and avoid the doctor as much as possible.