Bruce Schneier uncharacteristically giving up... but still give you some good advice on securing what little identity you have left.
* Enable two-factor authentication
* Don't reuse passwords
* Get a password manager
* Disable the "secret questions" and other backup authentication mechanisms
* Watch your credit reports and your bank accounts for suspicious activity
* Set up credit freezes
* Be wary of email and phone calls you get
https://www.schneier.com/blog/archives/2019/05/protecting_your_2.html