I had a terrible interview at Citadel. The interviewer basically messed up all the things that we as an industry have learnt not to do over the last 10-20 years

I had a terrible interview at Citadel. The interviewer basically messed up all the things that we as an industry have learnt not to do over the last 10-20 years. Not just the format, but it was adversarial, trick questions, he interrupted all the time, belittled my ideas, and was generally an unpleasant person. I dealt with it by declining the offer I received and making sure to give feedback about that interviewer directly to the HR team and that he was a contributing factor. While considering the offer I enquired about whether he would be in my reporting chain and made it clear that was a dealbreaker for me. Apparently the guy gave me the best feedback of all my interviewers. Why then did he need to be like that?!