They explained things quite thoroughly, essentially putting the unpleasant facts on the table upfront.

I don't know whether the interviewer had been set up before or whether they approach all candidates with preconceived notions. Throughout the interview, they kept questioning your abilities and repeatedly interrupted, not letting you finish speaking. Their manner while listening was also extremely rude—they were either taking deep breaths, rolling their eyes, or rubbing their face.

They also kept saying that they didn't understand the interviewee, while at the same time putting people into preconceived categories and continually judging you from the perspective they had assumed. In short, the interview was extremely unpleasant.

If you want to practice your patience and interview conversation skills, you can give it a try!