One time before LLMs we outsourced this project. It was something to sign file headers, written in ruby by an overseas company. It was something like 4500 lines

One time before LLMs we outsourced this project. It was something to sign file headers, written in ruby by an overseas company. It was something like 4500 lines long, and I wound up reducing it to something like 550 lines. My story, like yours, has nothing to do with the topic at hand. It happened many times to me, as well. Humans write terrible code. You didn't even mention if the code you're talking about was generated or not.