It's been screwed up since Lion I think, if that was the one where they played with the idea of "people don't have to save anymore", still decent but has some dumb bits of friction in the main flows from the mistakes of that idea.

The iOS version is straight up trash though if you're trying to work with multiple PDFs like bank statements on iOS.

My pet peeve is that every single time you click any web link in PDFs, you have to confirm via a dialog that you want to visit a link. You used to just be able to click links.