Too narrow, hidden, minimal feedback…
And just straight up broken by idiocy like infinite scroll.
I would imagine the same designer who implements infinite scroll would also design bad scrollbars
I recently had to talk a designer out of implementing a “webpage progress indicator” that was a thin horizontal bar across the top of the page that filled in as you progressed through the content.
Hey, it’s difficult to figure out how to present large amounts of information in a usable fashion. So let’s just NOT EVEN FUCKING BOTHER and just put everything into a gigantically long list instead.
It’s not that it’s difficult, this method encourages “doomscrolling” because the user doesn’t actively decide to go to the next page.
The Nielsen Norman Group observes that “infinite scrolling minimizes interaction costs and increases user engagement.” Infinite scroll keeps users engaged and on the page because the page never ends: there is always something more to see, no wait to see it, and very few interactions.