IT staff in a company I worked for believed mac addresses were concrete and unchangable.
I encountered a server architect who didn’t realize malware was the umbrella term for all the nasty stuff, and thought it was another category for virus, trojan, ransomware, etc.
I’ve met computer programmers who didn’t know anything about networking, hardware, nor active directory services which almost all corporations use. “Why can’t I login to the corporate network”, coz you’re not using domain account credentials…
One time I met a lawyer who called in a tech guy to fix his video playback issues, turned out he just needed to update his codecs, and he tested it by playing pornography with us right there in the office with him. The IT guy asked for a copy of the porno on his USB.
I had to write a batch script for IT guys to use to manipulate an SQL database because for whatever reason they didn’t have anyone on hand who could comfortably use command line.
I met THE stereotypical nerd. Whilst most IT professionals I encountered were for the most part professional since I work in a corporate environment I once encountered a guy that was fat, balding with an extremely receded hairline, but decided to grow his hair to waist length, his hair was riddled with dandruff, and wore glasses that were very thick. From what I remember he was a desktop support guy, wasn’t particularly bright either.
One time a top level executive complained to me that non of the IT guys could fix his email client problem, I asked if I could just take a look at the configuration and decided to just put in the typical defaults, smtp.domain.com etc with the typical default ports etc, and then it worked.
I feel like IT is just filled with tards. Anyone with a modicum of problem solving ability could do the job with sufficient motivation.