I had the same issues with windows 11 wanting to map everything to OneDrive/Documents Desktop...it drove me mad...so I removed it as I don't utilize OD anyway and have custom powershell scripts that automate removing all the bloatware/crap for 11 anyway. If you want to explore this then I employ you to visit: https://github.com/undergroundwires/privacy.sexy. Also OO ShutUp 10+ works for win11 as well.
Anyway...back on topic: there is a registry edit that needs to be made, and you need to modify a subset of folders to map windows away from OD even when it is disabled.
First, I would follow this guide if you want to just disable it, but I used PS to remove it entirely. (make sure to unlink it first or it'll cause problems). Simply removing / uninstalling / killing OneDrive doesn't stop it's madness. You need to dig deeper.
Unlink: (right click OD in taskbar on the right)
Utilizing: Win key -> run -> gpedit.msc https://www.elevenforum.com/t/enable-or-disable-onedrive-in-windows-11.2318/
NOTE: you need to have a Windows 10/11 Pro + license to use gpedit, otherwise you can only do this via registry edits. Windows Home doesn't have this functionality by default.
In the guide above, they also did not notate a new DWORD that exists...it's labeled "DisableLibrariesDefaultSaveToOneDrive" I set that to a value of 1. (it tells you what it does in the title itself).
Additionally, you need to browse to:
Win key -> run -> regedit to modify the following directory --- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
Once there, you'll see file structure mappings. They'll likely be mapped to some variant of OneDrive, I simply modified them to: C:\Users\%USERPROFILEGOESHERE%\Documents. (%userprofile% is your name for win10/11)
You can also modify videos, music, favorites, pictures, downloads, desktop etc etc as they will likely be linked to the OD Folder.
Boom, now you no longer have OneDrive and all the nightmares that come from mapping things anymore with Windows 11. (atleast for me).
Use something better like Google Drive, Dropbox...or whatever else to backup/sync.