npub1v8y2xk3wzc2w7rkfhraq8vhjf4de5x00h460x4lrdg206vtkdcvsdws6vc (npub1v8y…s6vc) Do you have access to a Time Machine backup? My guess is no, but that's one way to rebuild from scratch. Boot into recovery mode with TM backup on the same network (or TM drive connected). It should discover any backups and allow you to recover.
You also might try using Mitigation Assistant if you have a working Mac from the same era, but I've never tried it on a clean drive.