Meta Software Engineering Manager interview questions

My interviewer had prepared some questions based on my resume, but turns out it was someone else's resume, so he had to improvise when that came to light. He was extremely poker faced. No friendliness or warmth, or any attempt to make me comfortable. He asked the questions as if from a list, and after I would give a detailed answer, he would type out a poorly summed up version of what I'd said, verbalizing as he typed. Zero actual dialog. I tried to cover a bit of ground in my answers to anticipate follow up questions, and his follow up questions were often exactly what I had just answered, as if he wasn't listening. It was just a dry unpleasant interview.

Overall the process was good. after initial recruiter screens, 2 rounds of phone screen and then 6 rounds of onsites. The System design questions were tough but rest were okay.