The problem’s not so much that the posters are AI generated, but that they’re too crowded and unfocused. Their individual elements seem fine and look good, but when taken as a whole they feel wrong.

This may be a failure mode similar to juniors using AI and making it much harder for seniors to find the bugs, because the code actually looks good at first sight.

I don’t think the blog author actually has any design skills based on the prompts and the AI obviously can’t nudge them in the right direction or help them clarify their brief, like a real designer (i.e. not random online freelancers) would.