> absolutely none of these things will fly on an interview feedback in any big company

Sure, you never write "no hire because they worked at Palantir". You write "candidate didn't ask clarifying questions about {X} and jumped to answer {Y} which is not what I expect from a candidate of this level, no hire".

....this assumes that anyone at all reads your detailed notes if you submit an initial rating of "no hire", and I have very little evidence from my interviewing career across multiple companies to believe that's the case..