You can open task manager and disable SA from running. That would mean manually downloading drivers and the BIOS updates (which is a blessing in disguise), but will keep the system from downloading everything Dell related. Windows 11 is new and bugs will be present until probably mid 2022 when they have the update rollout finished.
I have a about 2 years old xps 15 9570 machine and did upgraded to windows 11 on Nov. 11, 2021.  My fault I should not do this. It is a nightmare it keeps crashing randomly.  The worst one was past Wednesday I open zoom it crashed 3 times during 1.5 hours.  Searched on-line and uninstalled dell assist as some one recommended.  Didn't help a lot.  Does Dell have any solutions? Anybody in this community has same issue? Thanks 
Windows 11 keeps crashing on my XPS 15 9570