I worked at a very bad company, where IT was aggressively incompetent, and mean about it. At best they were negligent, at worst they actively interfered with anyone who they thought was a threat, which included anyone who was more intelligent than them, which was virtually everyone since the company was full of senior EE/ME/RF/CS folks.

And I mean incompetent-- our network would go do down for hours, every day, and the problem lasted almost a year. It got so bad our "source control" became yelling "Whose got the latest main.cs?!" and walking it over with a USB key.

I realized we needed to disintermediate the IT group, and my boss was supportive. I ended up establishing our own, parallel IT department with a business cable line, some routers, and NAS devices. I outsourced any task to any cloud service (this was over a decade or so ago when that was somewhat unusual) — eventually hiring our own IT person even. People would ask for access to our network because it was more reliable :-)

Then things got vicious. They actively interfered with our group, trying to get us fired (they had some success with this previously). They were able to get our IT guy fired. Things just went on that way for years. They'd find some way to make trouble, and then we'd route around it. Once they even took my computer for two days, denied they had it, then returned it but locked me out of it. I was certain this was part of some scheme to get me fired, so I turned the computer off, zeroed the hard drive, and req'd a MacBook to work on.

They all eventually got fired when someone took note of their gross incompetence. One of their replacements was eventually fired for embezzling, proving that despite thinking we had the worst IT department anyone could imagine-- we really didn't.