[Tade0]

This is more common than it may seem.

I've worked in at least two teams where there were those non-written "standards" which one learned only after a few lengthy code reviews.

Usually a sign of people trying to cargo-cult themselves to good code.

At least one time it was simply a case of gatekeeping so that other developers wouldn't threaten that person's position.

[taylodl]

That's toxic. Especially when you're making junior developers feel they're not doing a good job because their PRs are being rejected for not adhering to not-published standards. Wow. I'd be looking for another job in a heartbeat. Life is too short to be working with people like that.