Blue Origin interview questions

Generally speaking the interview process was quite enjoyable, but the conclusion of it was very unprofessional. I was head hunted by HR and contacted to set up a phone screen. I had the call the next day and was asked to submit my résumé the following week. Within two days of submitting my résumé I was contacted and asked to come in for a "meet and greet". The meet and greet turned out to be an initial high-level interview with a propulsion engineer and the director of that group. I was told I would hear back in a few days regarding a technical interview. The following Monday I received a call inviting me to a technical interview. The technical involved giving a one hour presentation, followed by four 30 min one-on-one interviews with the presentation board. The one-on-ones were more interested in conceptual understandings of topics and seemed to be focused on understanding my thought process. After the technical interview I was contacted by HR saying they wanted to move forward and needed three references. After the references were contacted, HR called back to say they wanted to move forward and wanted to know what my salary request was. They then said I would hear back with an offer in a week. A week later I got a call and they said they were not interested in moving forward. I was not given a reason as to why or what happened and when asked when I could reapply, they said three years. Overall the interview process was a great experience, but the ending was very unprofessional. HR should never tell someone "you should expect an offer" and then turn around and say "we're not interested". It shows a lack of respect and a lack of professionalism. Needless to say I will not be applying again.