Dassault Systèmes Manager interview questions

Recruiter reached out to me on LinkedIn to start the process Round 1 : 30 min phone screen with HR Round 2 : 1 hour zoom interview with the hiring manager. I was also given an assignment to complete in 4 days Round 3 : 3 on-site interviews back to back, 30 mins each, discussed my experience and the assignment. At the end of the interview I was given a second assignment. Round 4 : A 15 min presentation to a panel of 5 people. After that was 30min 1:1 interview with manager's manager. HR called to reject me 5 weeks after the final interview Most interviewers were nice except for manager's manager he was doing his own working during the 1:1 with me, made me feel like I was talking to a wall. He also frequently cut me off and didn't give me time to complete my answers....