I wonder if this was made by AI or a shit programmer

Even the best models fine tuned for coding still have training that was based on both good and bad examples of programming from humans. And since it's not AGI but using probability to generate the code, you're going to get crap programming logic dependent on how often such things were used and suggested by humans to other humans. Googling for an answer on how to code something pulls up all sorts of answers from many sources, but reading through them, many are terrible. An LLM doesn't know that, it just knows that humans liked some answers better than others, so GIGO.