AstraZeneca Associate Principal AI ML Engineer interview questions

I interviewed for an Associate Principal AI and ML Engineer role at Evinova after applying online, the first Interview round was standard 30 min HR call, followed by a technical 45 min round where the interviewer asked background and cv related questions. The next stage was a 1 hour session where I gave a 10 min presentation of a project I worked on, followed by a panel Q/A. Then I didn't hear back until I followed up with the HR, which they said was negative. I then asked for any feedback but they ghosted me. The thing that really bothered me is the effort the candidate does put in the interview and presentation preparation, just for the company to ghost you and not even take few minutes to write you a short feedback.