MAJOR EDIT: Forgive me, I am tired. I also don't regularly use different keyboard layouts on different OSes. I need to clarify terminal shortcuts.

Control-C is how you terminate a process on terminal in macOS. I need to denote this as ^C, as such a key does not exist on traditional layouts. Cmd-C is copy. It is always copy, even on terminal (on Linux, you also have to hold shift).

If you use a Windows keyboard on macOS, your shortcut is now copy. After all, you are pressing Ctrl-C, so why wouldn't it be copy? Termination is now probably done with Alt-C.

If you're using Mac layout, none of this seems weird. I use a Mac layout on a Mac--all makes sense. If you don't, then stuff gets wack. Not a macOS issue. More of a "we've been using this layout for fifty years and changing it would be stupid at this point" sort of thing.

1. You can with extra software. See first paragraph of my original reply. Valid.
2. ..What?
3. The delete key does do something in Finder. When pressed with the Command key, it deletes the file with no prompt. I'd rather that not be a single key press. This is a preference, not an issue.
4. Mentioned already.
5. I'm sorry, this is literally user error. That's like saying Windows is stupid because it can't anticipate my "quit app" shortcut being Command + Q instead of Alt + F4. Or, for a closer comparison, like setting Ctrl + C to Meta + C instead. They're different operating systems, adapted for different keyboard layouts, and I shouldn't have to elaborate on why this is stupid.
6. Apps with multiple windows just kinda suck in general. I fullscreen everything, navigating between apps with gestures. Not quite multi-monitor, but fullscreen always behaves as expected and all gestures work, and the dock remains accessible--which I can't say for any other desktop UI in existence.
7. Preference that I personally like. Rude.
8. Hardware.
9. Absolutely true. They've insisted on a "one size fits all" volume bar for everything. It sucks. I laugh every time someone on an iPhone has volume trouble for this exact reason. Instead, you have to adjust media while it's actively playing in the foreground. How very intuitive.
10. Hardware. Granted, stupid, but still hardware. I'm pretty sure this is Apple Silicon only.
11. Just turn it off. I've never seen a benefit to having accelleration.

Not perfect, but none of this reads as annoying as a full screen advertisment telling me to upgrade to an OS that I know has incredibly invasive spyware.

EDIT: The "delete" key on macOS keyboards is backspace. The key should be treated as such. The delete key on other keyboards is in a separate location with a separate purpose, and should not be seen the same on Macs just because it shares a name. I've never used a full size keyboard on macOS, so I don't know how the forward-delete key works. If that doesn't delete files in one go, that might be annoying.. but not the other way around.