I think you might be missing one of the biggest biases that experienced programmers face. And fear. Its something like Agism. The less experienced interviewers are comparing themselves to the experienced candidate, to see where they rank against them. 25–35 yrs olds in these FAANG companies are ultra-competitive, and they think that it is ultra-competitive all the way up their careers. They just don’t know any better. They see a more experienced person as a challenge to dominate (not as a colleague to learn from). They lack an understanding of the most important skills of the trade. Nothing new here. It has been that way forever. So they are gonna set ridiculous challenges and be highly judgmental about the performance and outputs.

This is not interviewing, it’s testing by inexperienced testers.

And that’s not what experienced people want to deal with.