You're quite right. It's almost unusable on Windows in its default configuration.

I particularly like how difficult it is to toggle full-screen playback with the keyboard. F11 makes it full screen, but doesn't hide the controls. Ctrl-H hides the controls, but also disables keyboard shortcuts!

So now, when you want to get out of full-screen mode, you have to know that you need to press Esc followed by F11. Not even double-click gets you back to windowed mode.

This kind of asymmetric mode toggling drives me up the walls. That, and the fact it doesn't pause when you click the video.