Did you even open TFA?

> Slop UI is the UI that AI cooks up that looks off, where it’s not supposed to be, doesn’t serve a purpose or when a UI is too generic.

> This is seen in vibe-coded UI without a vision. Vibe-coded UI can look great when done right, but most don’t. And it makes the apps look cheap and unappealing to use.

Those are paragraphs 3 and 4.