If you have a lot of tabs open in Edge, then that would be causing all those sub-processes to re-appear even if Edge is shut down.
If you have already removed Edge from the Startup processes, then restarted your PC and that did not resolve the problem:
Click the link below to download a small free utility that does not require installation.
https://download.sysinternals.com/files/Autoruns.zip
When the file downloads, unzip it.
Run Autoruns64 as Administrator
1
Select the 'Logon' tab at the top of Autoruns.
Please provide a screenshot of all entries on that tab.
2
Select the 'Scheduled Tasks' tab at the top of Autoruns.
Please provide a screenshot of all entries on that tab.