ChatGPT is certainly no good at a lot of aspects of storytelling, but I wonder how much the author played with different prompts.
For example, if I go to GPT-4 and say, "Write a short fantasy story about a group of adventurers who challenge a dragon," it gives me a bog standard trope-ridden fantasy story. Standard adventuring party goes into cave, fights dragon, kills it, returns with gold.
But then if I say, "Do it again, but avoid using fantasy tropes and cliches," it generates a much more interesting story. Not sure about the etiquette of pasting big blocks of ChatGPT text into Lemmy comments, but the setting turned from generic medieval Europe into more of a weird steampunk-like environment, and the climax of the story was the characters convincing the dragon that it was hurting people and should stop.