Rejected After Fifth Stage Interview: Venting

12 YOE software engineer trying to break into SE. Got referred to hiring manager by a Director of SE at a Bay Area tech company (non-FAANG).

The process:

• Recruiter → HM → Biz Dev Manager → AE → left hanging for 2 weeks
• Then asked to prepare a presentation
• I prepped the shit out of it. Used guides from this sub, practiced with my (former sales exec) Dad, a CSM mate and tracked down a former SE from this company on LinkedIn who knew the panel
• Demo day: I thought I fucking nailed it. Multiple scenarios, slick presentation, some clever technical work behind the scenes. Demo had been refined with each round of feedback above.

Result: 3 weeks later - rejected because they went with "someone with more SE experience"

Pretty fucking annoying as they would have known that from my CV weeks ago.

Recruiter's offering detailed feedback tomorrow.

My question: Is there anything worth asking that might actually help, or am I just going to get corporate bullshit?

Anyone been through similar and actually got useful intel from these follow up calls?