All of those are achievable in Finder, the shortcuts I gave work precisely in Finder, and are also available as toolbar buttons and/or menu options.

>or don't follow a consistent convention and have to be done some other way.

The follow macOS conventions, not Windows conventions.

What's wrong with command-up to go to the enclosing folder? As the poster stated, you don't even need to use the keyboard shortcut, there's a menu item.

If I'm in a GUI app, I'm navigating with the mouse. Having to take my hand off the mouse to type Cmd+Up is not good UX for such a common command as "cd ..".

I already gave one method to do it with the mouse (Go -> Enclosing folder). There are several other ways to navigate to the parent.

For GUI you right click on the folder name and go to parent or you double click on the parent folder name in the path at the bottom of the window.

It might "confirm" the complaints but it also invalidates them. Fighting against the way something works isn't particularly valid, and is often ignorance (in the "don't know" way, not the obnoxious way). The guy helped with some knowledge.

This goes both ways. There have been whiny posts by Mac users who go to Windows (or from iOS to Android) and then gripe and complain about everything that isn't what they're accustomed to. It's just as silly.