Meritor Senior Inventory Manager interview questions

I received a call following an online application, which was essentially an initial HR phone screen. This was followed one week later by an hour+ phone interview with the hiring manager. Three weeks after that I went in for an on-site interview at the company's HQ in Troy, MI. I interviewed with an HR rep first and then two managers related to the position. It was pretty rushed and ended up lasting around 2 hours instead of the quoted hour and a half, though it ideally should have gone longer. One of the company interviewers could not make it, so I had another 45 minute phone interview 1-2 weeks later.. After that, I heard nothing even after several followups with the HR contact. I felt the overall process was not well coordinated across the different teams, and it was very unprofessional not to follow back around after all of the time invested over many weeks.