Someone who succeeds at a game with arbitrary rules without realizing that it's a game - it sounds nonsensical, but I've seen it too. It's some kind of selection bias for people who naturally operate that way, plus the Peter Principle.

When the game rules shift, those people flail. Recent example was that in 2021-2 nobody could hire fast enough, but now staff expansion is not common. Managers who excelled at coming up with reasons to spawn new teams did great until the money dried up. Some of them shifted gears and adapted, but others just couldn't get the message.