But, unless you were being an ass to that interviewer, whether you got along or not is not a measure of your quality as an employee.

Presumably you were being polite and trying to develop a rapport.

That means you didn't get along because the interviewer brought their own baggage or narrow mindedness into the interview.

This is very common and shows the interview process was incompetent.

That may sound like a strong word, but if you were qualified and they didn't hire you because of what this guy said, then they are, by definition, incompetent.

Maybe arbitrary is a nicer word to use, but it's the same thing.