... or the infamous -10x developer.
Count your blessings.
The 0.1x developer, if they're actually competent enough to remain employed for more than a probationary period, probably isn't at 0.1x; you're probably underrating them because you're better than average and are thus overrating what average is. (This is part of the Dunning-Kruger effect).
-10x developers should be fired fairly quickly if they're actually that negative and the business is being managed competently. I've worked with a few; they were fired within months or weeks.
Interesting to think it goes in both directions!
For instance, highly skilled people will often underestimate the difficulty of a task for average skilled people, because they complete it with relative ease. It's effectively an overestimation of what "average" is, because they think of themselves as average when they're really not.
"Relative" is the key word here. Your natural high skill performer may think a task is difficult, but they don't necessarily find the same sources of difficulty as average people.