Yes, it is frustrating and anger prompting to be treated as you are. It is helpful to remember that under the law you, the patient, are ultimately in charge. With limited exceptions you have the right to see your records and to make final decisions about your treatment. You are wise not to give up that decision making authority.
The most a Provider can do is state in your chart your actions were AMA, Against Medical Advice, as though that advice were sacred. Most times the Provider will recognize you are different and treat you accordingly.