Panel interview, where one of the interviewers kept laughing while I was answering questions, and any time I made a mistake. When I politely asked him why he was laughing, he deflected his behaviour and said I “lost my patience”. He kept smirking throughout the interview, and also left the interview while I was speaking. Unprofessional interview from a reputable company. This role is also not data science related, it’s just traditional process control.