I knew some bad devs that didn’t have CS degrees. They joined because they thought the money would be good and the companies wanted to reduce labour costs.

It’s really hard to explain to someone what loops are that doesn’t get it.

However some of the “worst” devs that I’ve worked with aren’t incompetent coders. They’re good “coders” that are fucking shit to work with. They refuse to fix their own bugs, blame you for their mistakes, ignore your feedback and management fucking loves them and gives them carte blanche. I’m talking over ten years ago but we implemented some cache system who refused to publish their docs online to “strengthen” relationships with their customers. Anyways, the dude implements it, doesn’t document anything (much like the product itself). Days past after implementation and I see what looks like a cache bug and I say, “Sergii, can we look at this together?” His reply? “No, I’m sick of looking at it” … I go to the manager and he says, “yeah I get what he means, I’d not wanna looks at it either” … great.