During COVID, I talked to 4 different people for 2-3 times each, ending up with something like 7 interviews, video or in person. When I got through this to an in-person interview, they informed me at the beginning that there would be another additional round, with the same people yet again. They told me this at the beginning and think this broke my spirit. They were probably being "COVID-careful" with their resources, but I later told this to a career coach I had at the time and she laughed and agreed it was ridiculous, as I was not a manager level hire or even doing tasks that would be particularly specialized. Good for them for being able to spend the resources to find the perfect candidate, but I wonder if they just did not actually want to hire.
Back to the interview---I admitted I didn' t know the answer to a question, and the interviewer (who would have been my boss, who I did NOT get along with) seemed shocked someone would do so. I said I'd look something up, and he indicated surprise people would do something like that. He then very obviously started instant messaging other team members who were sitting right outside. This led me to check out mentally more so, and it continued to slide downhill. As we finished and he led me out, the team members sitting outside giggled to him and looked at me like I was a side-show, while maintaining a fake air of respectfulness. I very much did not want to work there. It portrayed a very catty, highly perfectionist atmosphere that I would not have enjoyed. If you are someone who speaks straightforwardly, truthfully, and admits fault, go elsewhere.
I received an offer elsewhere and was very proud to be able to tell their human resources that I was no longer interested.