Why doesn't admin data fit after changing Account name on Mac?

Question

macOS

Hello!
I changed my account name and path in settings, rebooted my mac. I logged into my account at startup with the previous password, which I always used with sudo or anywhere. I found that the root account has not changed (the old username remains), the admin account data does not fit anywhere (when clicking on the lock in the settings, it asks to enter the login and password. I enter the old password and the new / old login, but it does not let me in, supposedly wrong data). Also, when commanded sudo gives:

krivomazoff is not in the sudoers file. This incident will be reported.

- krivomazoff my old account name. I see it in the /Users/ folder.
What to do? Demolish the system? Or is there any way to fix the situation?
Thank you!
UPD: Now my user is lit up as "Standart". Does this mean I'm no longer an admin?

Answer 1

The formal ownership of all files in the system remained under the old name. You can try to reassign all folders in the root of the disk in the properties to the current user and check the box so that this applies to nested files and folders, but wisely create a new user in the settings and transfer all data there, and delete the renamed one.
In a poppy, it's better not to rename users, but to create new ones.