Yes, different computers have different keyboards. Macs have had Mac conventions since 1984, and if you're not used to it you're not used to it. Instead of sticking to "the thing I'm not used to is wrong", I would suggest trying to be objective about which is the better UX.

I spent the first 25 years of my computer use being a Linux and Windows user and barely ever touching a Mac, so I've had to adjust, but to be honest, the truth is that Apple was always right and Microsoft made the wrong call.

Ctrl is meant to send control characters. This has been well defined since the birth of ASCII. In macOS, cmd-C is always copy, cmd-V is always paste. It does not matter what mode or program you are in.

Windows was designed for an IBM PC where the keyboard only had Ctrl and Alt, and when they copied Apple conventions (like cmd-X, C, V for cut, copy, paste) they made the wrong decision in using Ctrl for it. We've paid for this debt ever since. GNOME, KDE, XFCE, [...] devs continued this travesty by copying Windows, and so now on Linux Ctrl-C is copy in GUI apps, unless it's a terminal, in which case Ctrl-C will break out of your process, and copy is Ctrl-Shift-C. This is insane and bad UX.

The correct choice for a Linux DE would have been to use the "super" key ("Windows logo") for copy/paste etc, but of course they couldn't do that because 1) not everyone had that key and 2) it would confuse Windows users.

- Select with touchpad?? You must physically press its button like WTF

System Settings -> Touchpad -> Tap to click

- Mouse with backward/forward button?? Good luck!!

This is stupid. I will agree that Apple's insistence to not really support anything other than their own severely limited input devices is boneheaded. I recommend installing SensibleSideButtons.