I went through 4 interviews (one being 1.5 hours long) before they ended up rejecting me. I would advise them not to waste so much of people's time in the future.
Hello, we're sorry to hear you did not have a good experience. Depending on the position and circumstances, we take the necessary time to go through the interview process to assess the best candidate for the position. We appreciate your feedback as this helps us continue improve our processes!