Accept that the interview is over, end the interview, provide your feedback as emotionlessly as possible to your recruiter or HR, and then move on. Some might deride it as "tattling" but if someone is behaving in an unprofessional manner, then other people should know about it. Chances are, there is a recurring pattern with unprofessional people in this industry and your experiences aren't random.
I've had all sorts of bad interview experiences where interviewers have taken advantage of my naivete and kindness from all ends of the interview pipeline, especially early on in my career. Unfortunately, rude and unprofessional people are everywhere. Even if times might be tough, no job is ever worth sacrificing your self-respect.
I've had all sorts of bad interview experiences where interviewers have taken advantage of my naivete and kindness from all ends of the interview pipeline, especially early on in my career. Unfortunately, rude and unprofessional people are everywhere. Even if times might be tough, no job is ever worth sacrificing your self-respect.