There is a certain class of person who is not only ignorant, they are belligerantly ignorant. They screw things up on purpose, in any and every way way they possibly can. They do as little as possible (And you would be amazed at hiw little this can be) and cause endless headaches. They take great satisfaction in this. They can be extremely difficult to fire. Oftentimes they move around a lot, since they can’t get rid of them, they get passed around till nobody else can stand them anymore. Governmental agencies other than .mil (mostly) are chock full of them.
I have met people like that & worked with one in particular in a job that was not government - took over a year to fire her. She had a racial chip the size of a cinder block on her shoulder & she worked it to the last day. I ended up supervising her at one point & she lied about what instructions she’d been given - fortunately, some of us were wise to her at that point & always had a ‘witness’ around to verify what she was told. The day she was finally walked to HR for the last time was occasion for a celebration.
At the 911 job where I worked, the hangup employee likely would not have made it through the hiring process, much less training. Typically, 1-3 made it through a ‘class’ which was around 10. You were tested (written) every day. If you weren’t up to snuff, you were gone. Once we got out of the classroom & hit the phones with a trainer for 6-8 wks (trainer wrote up a review of what happened every day), people were dropping out like flies. To even get into a class required multiple board interviews, testing (could you type fast enough), psychological testing, credit & background checks. This gal never would have made it so I can’t imagine how lax/negligent the 911 center must have been in hiring, training, and monitoring. Our center had no problem firing people - you screwed up badly enough on a call or couldn’t take the pressure .... bye bye.