1. You’re not supposed to quit Finder.app. Unless you customise macOS somehow, the ability to do so is carefully hidden. There’s no menu item to quit it, Cmd-Q does nothing, and even the Force Quit menu has “Relaunch” for Finder rather than Force Quit. Any weirdness you might encounter from quitting Finder is entirely your own fault.
2. There’s a long history behind some of these things. macOS UI conventions stretch all the way back to macOS 1.0, released in 1984. Apple has preserved much of the behaviour of older versions of macOS, like keyboard short cuts and (some) of the spatial behaviour of the Finder. It might not be to your taste, but other long-time Mac users enjoy them. If you don’t like the spatial-ness, the Finder’s column view might be more to your liking.
3. Speaking of taste, many of these gripes are just complaining that macOS doesn’t work like other operating systems. If you want your OS to work like Windows, maybe just use Windows? You think the Enter key should open things in Finder? Long time Mac users would be incensed if Apple changed this, because we’re used to using Enter to rename things, and Cmd-O if we want to open them. Window zoom not making sense to you doesn’t mean it doesn’t make sense to other people.
There certainly are some valid points in there, but I certainly hope Apple doesn’t “fix” your other complaints, because that would break conventions we’ve spent decades getting used to.