Red Hat Technical Support Engineer interview questions

Had one video interview with HR as a screening, another with managers asking about my experience and background, and a technical to gauge my Linux knowledge. The first two interviews were easy. The third interview I was kind of thrown off guard because I was told the interview would be about how I problem solve but it was mainly pure technical questions.

I applied for the position of Technical Support Engineer. HR reached out six weeks later, which is already a bad sign. She asked me if I'm still interested. We had the first stage of the interview two days later. The first stage is a HR interview, and the HR lady from Argentina said she would email me about the second stage interview which is a technical interview with their manager. There was no update after waited three weeks. I only found out the application was rejected when I looked on the Red Hat careers website where the status of the job application was showing "Not selected". She ghosted. Totally unprofessional like most tech companies out there.