Sorry to hear about your experience. I am currently going through the interview process and have had many similar experiences.
Not sure whose fault it is in the end, recruiting manager, hiring manager, software engineers, etc. To me it screams a communication issues throughout the company.
To answer your question, it's not normal to be bullied in the workplace even if it's just for an interview. Be glad that you found out now and not after you started working for them.
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