(Gnome) Some applications launched as root do not follow dark theme

In the last 5 years I have never needed access to the /root folder. I wonder what you are doing that you feel it necessary to access that folder.

I also have never needed to use anything other than sudo for admin tasks, although I do set a root password just in case there is need to enter the root password if the system happens to boot to emergency mode. (have seen that once in the same 5 years)