Installing from the Media Creation Tool has not worked for me and all my drivers are up to date. Windows always rolls back during reboot at about 85% when I have caught it. I started to try updating with the previews in the summer. Windows Update says it is eligible.
This is a Dell laptop - I shouldn't be having these issues.
I agree totally with you. I also have a Dell laptop (Inspiron 7506 2n1 purchased in June 2021). Likewise, I have attempted upgrades to Windows11 starting in September and the last one (I think) in December 2021. The message saying my laptop is ready for Windows 11 has not appeared for the last couple of weeks though, so I have not tried again, but will do so soon.
When I raised the issue with Dell support last year, they ended up telling me to reach out to Microsoft who haven't been terribly helpful.