Confluent Senior Software Developer interview questions

Applied online and afterward the recruiter call who offered me two positions with same requirement that I can choose. After an phone coding interview, I did the on-site with 2 coding, 2 system design, and one behavioral. I believe that I did well in all of them because all interviews were interactive, I completed the assignments, and discussed the alternatives and proposed extension and improvement ideas. Interviewers were very friendly. In the end, after 7 hours of interviews, I have not heard anything. I contacted HR and recruiters who were organizing the interviews. After being passed across multiple recruiters, I have been notified that my case is lost between recruiters! Finally, my application was found and I have been assigned to another recruiter. No news after 1 week, reached out the recruiter and noticed that he is on vacation and passed on to another recruiter!!! After 4 weeks of no news, I have been really pissed off and withdrawn my application. One of the interviewers from on-site warned me to be aware because he referred someone and he had a terrible experience!!! Coordination is really terrible. I feel that I wasted 7+ hours of my time plus preparation!