Gradient purple hero
Ask a model for a landing page and you get the same one: a purple-to-blue gradient hero, a centered sans-serif headline promising to supercharge your workflow, three feature cards with rounded corners and pastel icon chips. It is the median of every startup site in the training data.
Why it fails
Design exists to differentiate, and the gradient hero is the statistical center of the category. A visitor cannot tell your product from the last four sites they closed. The layout also smuggles in a content failure: three feature cards force the pitch into three equal-weight fragments, whether or not the product has three equally weighted things to say.
Fix
Start from the product's one distinctive claim and design the page to prove it: a real screenshot over an abstract illustration, one demonstration over three cards, typography with a point of view over the default stack. Keep a folder of befores and afters; the pattern in contrast pairs applies to design as much as prose.