Change shortcut of  in finder I've managed to change shortcut of "Copy" to ^C for most applications by going to "keyboard->shortcut". But in Finder, the "copy" menu item is dynamic, like Copy "documents", I don't know how to change it.

I am aware of some 3rd party extensions that can do the job, I am just asking if there is any way to achieve this without installing any software.
Honestly, trying to individually replace any/all occurrences of the  Cmd ⌘  key with  Ctrl ⌃  is futile. 

You can globally swap the keys in System Prefs > Keyboard > Modifier Keys... but I'm not even sure I'd recommend that.  



Long term, I'd recommend, 
"Get used to it. Don't fight it."