Adyen Project Manager interview questions

Lengthy hiring process. Looked like a waste of time to me all along. Very slow response in between interviews. First i prepared a lengthy case study and presented it (this was at last minute notice - just gave me 3 days to prepare) Then i presented it and the manager said that it was very well done, advanced to the next round. Interviewed again by 2 people, they seemed very positive. Again 2 weeks later advanced to the next round with senior leadership. Nothing could really go wrong as they hardly had 2 interviews of 15-20 minutes to talk to me. Got contacted and rejected by manager 2 days later - without any plausible reason except that they knew ALL ALONG that I did not have this industry's experience. Solid excuse after wasting my time for so long.