Relocation of User folders can always be untangled in the Registry. It's actually a fairly common problem here --- users accidentally select the parent folder (thinking the desired folder will be automatically created). Then a Registry edit is required.
The relevant Registry key is:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
Additional entries may appear as folders are redirected. This is because there are actually twelve system folders inserted into This PC. In my screenshot, I have played with redirecting Documents. That is why both 'Personal' and '{d3162b92-9365-467a-956b-92703aca08af}' appear here.
So, in your case, I would redirect the folders found in the User's profile folder to the OneDrive folders. Then the folders become normal folders (without a 'Location' tab) and can be deleted. Likewise, modify the Library definitions so that they only reference the OneDrive folders. Then, the folders under This PC, OneDrive, and Libraries should all be the same.
Here's a handy reference with the first column being the entries found under:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\MyComputer\NameSpace
The second column the name, and the third being the FolderDescription ID, which may appear under User Shell Folders instead of the name:
GUID : {088e3905-0323-4b02-9826-5d99428e115f}
Name : Local Downloads
FDID : {7d83ee9b-2244-4e70-b1f5-5393042af1e4}
GUID : {0DB7E03F-FC29-4DC6-9020-FF41B59E513A}
Name : 3D Objects
FDID : {31C0DD25-9439-4F12-BF41-7FF4EDA38722}
GUID : {1CF1260C-4DD0-4ebb-811F-33C572699FDE}
Name : My Music
FDID : {4BD8D571-6D19-48D3-BE97-422220080E43}
GUID : {24ad3ad4-a569-4530-98e1-ab02f9417aa8}
Name : Local Pictures
FDID : {0ddd015d-b06c-45d5-8c4c-f59713854639}
GUID : {374DE290-123F-4565-9164-39C4925E467B}
Name : Downloads
FDID : {374DE290-123F-4565-9164-39C4925E467B}
GUID : {3ADD1653-EB32-4cb0-BBD7-DFA0ABB5ACCA}
Name : My Pictures
FDID : {33E28130-4E1E-4676-835A-98395C3BC3BB}
GUID : {3dfdf296-dbec-4fb4-81d1-6a3438bcf4de}
Name : Local Music
FDID : {a0c69a99-21c8-4671-8703-7934162fcf1d}
GUID : {A0953C92-50DC-43bf-BE83-3742FED03C9C}
Name : My Video
FDID : {18989B1D-99B5-455B-841C-AB7C74E4DDFC}
GUID : {A8CDFF1C-4878-43be-B5FD-F8091C1C60D0}
Name : Personal
FDID : {FDD39AD0-238F-46AF-ADB4-6C85480369C7}
GUID : {B4BFCC3A-DB2C-424C-B029-7FE99A87C641}
Name : Desktop
FDID : {B4BFCC3A-DB2C-424C-B029-7FE99A87C641}
GUID : {d3162b92-9365-467a-956b-92703aca08af}
Name : Local Documents
FDID : {f42ee2d3-909f-4907-8871-4c22fc0bf756}
GUID : {f86fa3ab-70d2-4fc7-9c99-fcbf05467f3a}
Name : Local Videos
FDID : {35286a68-3c57-41a1-bbb1-0eae73d76c95}
You can quiclly access these folders by typing 'Shell:<Name>' in the Address Bar of Explorer, i.e. Shell:Local Dockuments
Keith