Similar experience in junior high, took an in-person IQ test and scored highly but instead I thought “this will make people feel envious, I’ll keep it to myself.” When I found out how stupid being proud of IQ results was, I was so glad junior high me lucked his way through cringe-inducing-memory-free.
Also I watched an hour long documentary about “the man with the highest IQ in the world” with my mom and thought “this guy is insufferable, must be related to high intelligence.” But no, it was trash reality TV disguised as a documentary. I think the guy believed he was an unparalleled genius, though.
Studying to ace an IQ test shows you’re not debilitatingly mentally challenged, though. I think that’s all the test is really good for.