Sorry but I really think it’s AI. The only time I played around with AI of any kind was to see how it’d handle pixelart and it looked very similar to this. It’s good at a very quick glance but quickly falls apart (like a lot of AI things) as soon as you actually look at it. I don’t see how a human could mess it up that oddly and badly. It would take more effort to make it this bad than just make actual pixel art, there are so many small things that make no sense as errors or sloppy/lazy human art.