Interviewer does not have knowledge on technology on which he is taking interview . Asking irrelevant questions and expecting answer what he knows . Asking questions which are not part of job roles

One of the most terrifying interviews I ever had, there wasn't any ease in the conversation, strong technical questions and very unfriendly interviewer. But the worst part when I wasn't selected which was still okay as it was my first interview in Canada and I didn't give my best, but I dropped mail and sent a linkedIn request to give me feedback as it would help me to get better in upcoming interviews, he blocked me in LinkedIn. It's demeaning and took days to get over the fact that I was blocked with no reason.