Gro Intelligence Data Science Engineer interview questions

1 recruiter round (surprise 3 simple technical questions), 1 tech lead python coding, and ml questions round.1 leadership system design question. Didnt progress after this. Possible a C-suite interview could have been scheduled next. The interviews went well but for some reason, they felt I was not technically strong enough even though I solved all the questions and answered everything technically where they felt I answered adequately in the interview. They did not provide details or specifics about why and gave very generic feedback after more than 4 hours of my time.