Sure sad, but sometimes better to uncover company culture issues quickly and leave before engaging. Would you like to work with such selfish perfectionist everyday?

True. The company I worked for the shortest time in my life had a similar culture. There was basically no interaction between employees other than trying to one-up each other with tricky math puzzles and obscure details of the C++ specification. And not in a friendly banter way. I quit after 4 months.

Even more vicious behaviour if the employees add these math puzzles, unnecessarily to code and setup traps for those who interact with the component.

From my experience, it feels like people just don't care at all about it.

My resume has a section "Achievements" with "StackOverflow: top 2%, 300 answers" with a link to my profile.

IMO a good StackOverflow profile shows:

1) A skillset

2) A proficiency to solve real life problems (quickly) just by reading (incomplete/wrong) problems description

3) Good communication skills

4) A self-motivated and passionate person

Well, nobody never said/asked anything about mine. As if every one of their candidates had 10k points on StackOverflow.

I still had to pass really stupid/basic tests for jobs I'm obviously competent for.

Worth noting I also have 7 years of xp, including xp as tech lead. And a master in CS.