Fragen im Vorstellungsgespräch für Beschäftigung als Customer Support Consultant bei IDEXX Laboratories

First, I was contacted by a recruiter who set up a phone interview, then a virtual interview was scheduled with the hiring manager and two team members. The virtual interview was a couple of months ago and it seemed to go well. Interviewers were friendly, but it felt rushed and impersonal, as they just rapid fired questions at me. I did not receive an offer but did receive an email stating that I should apply to the next hiring class in October, as they had liked me and still wanted to consider me. I applied as soon as the posting was live, and I reached out to the hiring manager I had previously interviewed with to express my interest again. I never heard back and received an automated rejection email 2-3 weeks later. I'm not sure as to why they made the effort to tell me that they wanted to consider me for the next hiring class, only to give me false hope, ghost me, and waste more of my time.