The worst "Biggest Swingin' Dick on Campus" ego-fest I have ever experienced was working at the F in FAANG...

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Such a den of.... you can fill in the rest...

I know someone who was literally fired for being "too social" -- and all they did was participate in the stupid parties that were had like "Build you're departments happy hour bar, here is $400 for alcohol to stock it up!!"

I had a few FAANG+M people join my (reserve) unit in the army doing cyber and 6-shop stuff who thought they were hot shit. Some actually were, but the mentality was universal regardless of ability.

I look back fondly on the internal wiki pages documenting all the available "bar space" in the Facebook Seattle office.

Finding hard workers isn't easy. Leetcode is not a bad way to do it. It's not a great way, but it works and more importantly it scales well to the organization level.