I'd like to think that most companies don't really test out the friction and experience of their hiring processes. A good company might have one or more interviewers that are not so good.
A good company absolutely tests the friction and experience of their hiring process. At my company we have an entire “candidate experience” team that works hard on measuring and evaluating it, and we take that feedback seriously. Occasionally we decide take people off the interview pool for a while and have them do more interview training if they want back on.
On the other hand, definitely on the candidate to gauge whether the person they're asking is a total curmudgeon or not before asking.