How to deal with an arrogant HM

Had an awful experience during an interview at Cisco recently. I cleared all technical rounds so was pretty excited for the HM round.

First, the manager who was supposed to interview me kept canceling and rescheduling. Then on the day of the interview he kept doing some work, half hearing my responses. He would often cut me in the middle and repeat the same thing I said, or not wait for me to finish and start telling me how to answer the question. Finally, he gave a no-go for my interview.

I feel very demotivated now.