If the company thinks this is the person best qualified to judge applicants, you're dodging a bullet.
There are so many reasons this is a bad way of thinking.
- A sample size of one is never enough. This alone is enough of a reason.
- The interviewer could have normally been a great person but been having a rough day (maybe some personal stuff or a huge deadline coming up - every company has those every once in a while, you might have just got them at a bad time)
- The original interviewer had to cancel last-minute (call from the hospital/school, car crash, etc) and the company decided that it would be more professional to put you with someone with less experience than cancel thirty minutes before your interview (which could be good or bad depending on how you see it)
I'm not saying that you're completly wrong - it's definitely an indicator that the company may not be one you want to work for. But you shouldn't rule out a company because of one bad interview.
Let's say the candidate behaved in this way, should the company ignore it?