Stilt interview questions

Not sure what went wrong as I thought everything went well overall. Had an initial screen/interview with a manager within department. Progressed to final round which were back to back rounds with same manager (apparently hiring manager was gone a week later from my initial interview - red flag??) , controller and CEO . I thought the feedback from the hiring manager was positive and felt I’d be an excellent fit. So I was surprised to receive a rejection email the next morning…. Honestly the whole process is a bit much, seems they want to spend time in a perpetual hiring process rather than actually hire someone on and have them start work. Very disappointing. The position is still vacant btw; there is no one perfect person!