Even if you successfully changed the name, you can't delete this folder because you are using it. You cannot delete yourself, so the machine will not have an account profile.
You must re-create an account to delete its profile, but the system will generate the profile of your new account again, which is another folder.
Suggestion: create a new administrator account, not an administrator, but complicated;
Change the administrator's name, for example: A3iO9kBV, that is, case and number are mixed. Of course, Chinese will do. This makes it difficult for others to crack, and the password is very complicated. You don't have to remember the password yourself, just remember the password of the new account. (This specific method: run gpedit.msc and open Group Policy, Computer Configuration and Windows Settings. Run "compmgmt.msc", open "Computer Management", "System Tools", "Local Users and Groups" and "Users", and find your administrator user to change the password).