How To Change User Name Windows 11

As others have said, these instructions do not work for simply changing the computer username and the user's folder on the desired PC. 

I have a new Windows 11 computer, and want my username and user folder to be the same username I use on all my computers "fubar1". However the name my Microsoft account is under is "Jon Doe". Windows created my user folder as "jondo". WHY is there no way to control my username / user folder? This is really really frustrating. I can control my username on older Windows versions and in Linux. Microsoft is really frustrating a lot of people by not letting them have control over something as simple as their username. Please provide an EASY way to do this that works. Even if the instructions you provided did work (they do not, and moreover they don't even match the menus that show up in Windows 11) we should not have to go through such a long and convoluted process. Too many steps. That do not work. Please fix.