As someone who only encountered windows after a decade of using mac and started using windows (not by their own choice) there are hundreds of little annoying, broken or inconsistent OS things I find.
Now I've used windows for a decade, and I still overall dislike it. But that doesn't mean these things are done "wrong" they are just done differently and not how I'd expect.
Windows doesn't place the light switches where I'm accustomed to. For example hy are there so many menus bars on each window. It's simpler to always know where the menu is at the top and it creates less screen clutter. Why does windows quit a program when close the document. If I wanted to quit it, I would have quit it. I just wanted a new document. These are just a few of the things that aren't bad but just aren't the philosophy I'd come to expect. Control-alt-delete to log in? Why?! I can't hit that one handed easily! Good thing I have two hands. And yeah bash or shell is kinda mess, but powershell is a verbose and has bureaucratic feel. It's just not my cup of tea but that doesn't mean it's wrong.