Deliveroo Operations Manager interview questions

Had 8 interviews in total. I started in September with a Operations team which was quite professional. Unfortunately I failed the interview and the operations manager was kind enough to provide me with feedback. Then the nightmare begun. I was then referred internally (by the ops manager who interviewed me first and another ops manager that interviewed me later) to another ops team, and another one.. and another one. Totalling 8 interviews with 4 different teams for more than three months. Each time I was tasked with logical problems, powerpoint presentations (one team didn't even bother looking at the presentation after giving me less than 24 hours to prepare it), case studies, creative exercises etc. The funniest part is that I was rejected by each manager for not having the exact operational experience the role required to be referred by the same person to another operations team! I believe a company should put selection processes in place to know whether a candidate is a fit for the role, rather than having them coming to the office every each time only to give the same exact response.