Block Account Development Representative interview questions

I applied online and received an email from a recruiter the next day. I had to do a video interview. I recorded myself answering 5 questions and submit them. I fumbled on the second go around, so I was surprised when a day later I received an phone call& email from the area dept manager offering me an in person interview. My interview was scheduled about 3 days after. It was scheduled for a little over 2 hours. I had received an email stating I’d have to do a mock call during. My first interview was with the hiring mgr, I did the mock call, it went great. I didn’t receive any negative feedback, I then was to interview with 4 more members of the team that day. Another manager, a person whom was promoted, a person who currently worked in the role, and a person who worked a different but co-existing dept. As one could imagine, it was exhausting. They were all very pleasant, however. The interview went very well in my opinion. They assured me I’d know by the next day. Rest assured the next day I received a rejection. I am confused, since the interview did go so well, I also had the qualifications. Not quite sure what I could have improved on.