I just tried to open the context menu in Windows Explorer. It showed up almost as soon as I released the mouse button, and I have a much slower CPU, older video card, and way less RAM then you do. I was also running 12 windows of Firefox with collectively 1000+ tabs (though only about 36 or loaded), Steam, a Unity game, and Microsoft Teams, plus a number of background programs.

If your Explorer context menu is taking more than a split second to load, there's something wrong with your hardware.