Serverfarm interview questions

Typical HR Screening followed by interview with who would be leadership followed by individual in the department. Everything was going really well and then ghosted. Just zero response even when I wrote an email to Recruiter asking for the status. I understand not receiving word if I submitted my resume and got nowhere, but after three interviews, and they seemed to go really well, ghosting is very disrespectful.

The phone interview was not smooth at all. After waiting twenty minutes, I ended up calling the company's HR Department and, magically, the HR Department knew that I was the one calling. I moved forward to the virtual interview with the hiring manager. The hiring manger got upset that I called the job position an experimental job position. In the end, I was rejected. I asked for feedback. They said that I was not "corporate" enough. What is that supposed to mean?