Someone else said it on HN a couple years ago...Something about how there's no such thing as a 10x engineer, but there are a LOT of 0.1x engineers and a few 2x.

The absolute worst is someone that tries to brand themselves as a 10x engineer by constantly using programming terms like "dynamic programming", "polymorphism", "recursion" and the like, but they're really a 0.1x engineer because they don't truly understand what any of those are and when they should actually be using them, and so try to shoehorn them in when they don't need them while also not understanding them, and end up writing low-quality crap.

Took too long for management to get rid of that guy.