Talking about overlays on top of content: Videoplayer overlays! Pops up every time the mouse move a pixel, darken the entire screen for some stupid reason, sometimes with some text or a huge play/pause icon, and sometimes just refuse to disappear until you've focused and unfocused the window again or done some other mystical ritual.
Anything overlaid on top of content, especially those chatbot bubbles.
Also, "No, thanks"/"Remind me later" options on popups where they should be "Fuck off and don't show this ever again".
Talking about overlays on top of content: Videoplayer overlays! Pops up every time the mouse move a pixel, darken the entire screen for some stupid reason, sometimes with some text or a huge play/pause icon, and sometimes just refuse to disappear until you've focused and unfocused the window again or done some other mystical ritual.