Yes, I am talking about OSX. But what bugs me almost every day is one tiny, little issue which I can get around using my common sense.

Ok, here is the challenge: you are using the Finder in tree-view mode and you want to create a new folder in one of the displayed tree branches. Nothing easier than that, you might think. Just select the respective folder which should host the new folder and select the "New folder" menu. And boom, the new folder shows up on top-level and not where you want it.

C'mon Apple, even Windows can do that. What's the deal of not supporting this obvious mimic? And even if there is a secret super duper command to achieve that, why not supporting the obvious?