I dealt with almost the exact same thing at my last job, but in my case, the power dynamics were split between two offices and I had a defender pretty high up w

I dealt with almost the exact same thing at my last job, but in my case, the power dynamics were split between two offices and I had a defender pretty high up who had watched me get to work and figure stuff out by being down the hall from me every day. Nonetheless, in the end the buffoon was more than I could take, so I gave notice, and ended up in a different department. Sure enough, he brought in an expensive vendor to implement a replacement for a thing I had been using to handle file server loads for years without issue. A few months later, sure enough, his black box solution started corrupting files on the network, and he was gone soon after. I would have gone back to the IT dept but I was making more as a Python dev by that point.