What is the correct way to delete a user's profile in Windows Server 2016? & why do we delete them?

What is the correct way to delete a user's profile in Windows Server 2016?

1. Run netplwiz.exe and delete the user profile
2. Remove C:\Users\username folder
3. Delete corresponding registry key under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList                                  

why do we delete them?

You usually delete them as a clean up process of the user that left the company + to get some disk space

Is deleting a user's profile will help resolve some login issues when a user was accidentally deleted in active directory & then re-created w/ the same user name?

Please advise, thanks.

it can
if a user was deleted and created again with the same username and their old user profile is present, i would expect the new account to have a profile folder named user.001 since the folder named user already exists

Noted w/ thanks.

Or sometimes I see that it appends a suffix ~ domain name in the user's account login name in Windows

that's because there is a local account with the same username
if the local administrator account is used, then the profile will be named administrator
login as the domain administrator, the folder name will be administrator.domain 

If you create a local user called TestUser and you log in with this account first, the "C:\Users\TestUser" folder will be created.
Then, if you create a domain user called TestUser, the "C:\Users\TestUser.domainname" will be created.

If you reverse it:
If you create a domain user called TestUser2 and you log in with this account first, the "C:\Users\TestUser2" folder will be created.
Then, if you create a local user called TestUser, the "C:\Users\TestUser2.computername" will be created.

noted, tnx

appreciate all your feedback, makes all things clearer why we're having these login issues

*** if the user’s profile is deleted, will it also remove or delete all the files, folders, desktop etc. in the server or PC?

Local user data are deleted = all under C:\Users\testuser (C:\Users\testuser\Desktop, C:\Users\testuser\Documents, C:\Users\testuser\Downloads, C:\Users\testuser\Pictures, etc.).

perhaps make a backup of data before deleting a corrupt user’s profile

Sure if you feel you might need them.

It’s been a while since I did this, but it’s either part of SCCM Tools, or the SCCM add-on “one-click” tools that does it all for you
It lists all the profiles and deletes the profile and the registry entry with a click of the mouse button

unfortunately we don't have an SCCM in our environment

I feel the question should be closed differently.

Answers to the main question were provided in these posts:
https://www.experts-exchange.com/questions/29193386/What-is-the-correct-way-to-delete-a-user's-profile-in-Windows-Server-2016-why-do-we-delete-them.html#a43149660 
https://www.experts-exchange.com/questions/29193386/What-is-the-correct-way-to-delete-a-user's-profile-in-Windows-Server-2016-why-do-we-delete-them.html#a43149662 

Answers to the additional question were provided in these posts:
https://www.experts-exchange.com/questions/29193386/What-is-the-correct-way-to-delete-a-user's-profile-in-Windows-Server-2016-why-do-we-delete-them.html#a43149672 
https://www.experts-exchange.com/questions/29193386/What-is-the-correct-way-to-delete-a-user's-profile-in-Windows-Server-2016-why-do-we-delete-them.html#a43149684 
https://www.experts-exchange.com/questions/29193386/What-is-the-correct-way-to-delete-a-user's-profile-in-Windows-Server-2016-why-do-we-delete-them.html#a43149685 
https://www.experts-exchange.com/questions/29193386/What-is-the-correct-way-to-delete-a-user's-profile-in-Windows-Server-2016-why-do-we-delete-them.html#a43150050