The interface... Oh.. the terrible terrible UI on desktop...

Switch tabs, come back.. it refreshes everything and you can never go back.

Comment threads with 100+ comments with only a "show more" link, which again.. se previous paragraph.

See a video, click fullscreen icon. Doesn't go fullscreen, goes to some weird modal window, muted. Click fullscreen again..

And I'm sure I could go on... It's really a sad shell of the simplicity it once was.