Ryanair Commercial Graduate Program interview questions

It was very fast and smooth, it was my dream job, so I was extremely flexible with the interviews, always said yes for the time they said. I went thru 3 interviews, for the last one they invited me to Dublin to present my case, they even paid my hotel. At this point I was extremely optimistic (as always), but then 4 days later I got the most basic rejection letter, highlighting that "Unfortunately, we cannot give any detailed feedback at this time. ". What do you mean? Seriously?! I spent 2 whole weeks of my life for the application and wanted not to believe the stereotypes that this airline is just cheap, careless, negligent and emotionless, however with this, they showed their true face.