Semrush Technical Writer interview questions

Applied. Received an automatic email inviting me to choose a time for the next round of interviews. The person who invited me didn't bother to show up to the interview. When I emailed them about rebooking, they eventually replied. The interviewer and I had a 30 minute conversation. In the interview, they informed me that they were on the team I would potentially join. From what I was asked, I got the impression that it was a "fake" or unauthorized interview that the Semrush HR probably didn't know about. The interviewer was dismissive, rolled their eyes, complained about the company, and made inappropriate comments about my CV, professional experience. They also sneered a lot during my answers.