Linux isn't a single OS. It's hundreds of different and weird combinations.
There are Linux distributions that are better than Windows or iOS for grandma to use as well as distributions where you need to be an expert to do anything.
The only easier one is ChromeOS
It doesn't matter, your options are either X11 or a Wayland-based compositor, both of them come with their respective headaches that a regular user has NO IDEA how to fix.