Modern UI designers don’t have a fucking clue.
You’d think the first principle would be “don’t break the existing fucking UI”, but no.
Infinite scroll. Windows without toolbars. Replacing context menu with useless site-specific one. Forcing links to open in new or same tab, depriving the user of choice. Blocking text select. Blocking copy, as if that’s somehow going to stop people from stealing your shitty content. Fucking with the browser history.
And then there’s the constant reinventing of the wheel. How many times do we need to implement a fucking checkbox?
No lie, I’ve actually had designers come to me with a concept for “a visual indicator that shows the user how they are progressing through the page”.