Marsh Risk interview questions

What a waste and lack of respect of my time and energy. I was contacted by Marsh and did a phone screen in March. I was told the interviewer was very busy and that they wouldn't have time to interview till May. In early May, interviews were set up, canceled and re-scheduled by Marsh twice - saying the interviewer was busy. Finally booked an interview and the morning of, they made contact 30 minutes before the interview asking to push it from 10a-11a. I agreed and was waiting in the lobby at 11am. Interviewer did not come to collect me till 11:25 and I was done and out of the building by 11:45. Interviewer had little interest in getting to know me and when I asked if they were considering many other candidates, I found out the position was being filled internally. If that was the case, then why waste my time and effort? So completely disrespectful.