I'm genuinely curious what you see as an ideal state here? Most end-user oriented Gnome and KDE-based desktop OS's (Ubuntu, Fedora, Mint etc.) are already mostly configurable from menus, for most features an end-user would need to care about. (If I'm mistaken - what feature did you have in mind which isn't?) Outside of that, just run the application you're trying to run.

Why would the user need to worry about the ergonomics of the terminal? Is that something people worry about on Windows and MacOS?