easy and non-informal with low stress or worrying about what to say or describing specific events was geared more towards explaining why I'd be a good fit fir the role

I was initially contacted via Linked In by an internal recruiter who i had a phone interview with to qualify if i was a good fit for the role. First impressions of the recruiter and the opportunity were great and I was advised that the interview process was 3 meetings (no presentation/pitch) with key stakeholders including the CRO, however this was not the case as it was 4 meetings (2 x F2F) including a final interview which was a business plan presentation. I was informed i would be notified in a few days of the outcome, however this date passed and after chasing for over a week I received an automated email advising i was unsuccessful, so I chased for another 2 weeks asking for feedback and was just advised via email from the recruiter that my pitch wasn't strategic enough. This is hugely disappointing after investing 4 hours of my time for interviews and 9 hours presentation preparation and the feedback would have been invaluable as i was applying for a more senior role that my current position. I have never experienced anything like this and have fed this back to Zerofox with no reply