Q - " If not quick easy fix - Want to REVERT back to earlier version of os, please.
A - This could be problematic
A- From Terminal application use the command ( copy and paste ) for best results
softwareupdate --list-full-installers
What is the Output ?
This is what I am getting
Title: macOS Ventura, Version: 13.1, Size: 11931164KiB, Build: 22C65
* Title: macOS Ventura, Version: 13.0.1, Size: 11866460KiB, Build: 22A400
* Title: macOS Ventura, Version: 13.0, Size: 11866804KiB, Build: 22A380
Then and really suggest understanding what the Revert to Previous Version will entail
In The Link below, the Procedure and Method is relates to Downgrading to a Previous Version of macOS like Monterey macOS 12 but the Method and Consequences are the same
Two specific Methods are included.
One for Intel Computer and one for Apple Silicon M1 / M2 Computers
https://www.howtoisolve.com/downgrade-macos-ventura-to-macos-monterey/
Personally, would suggest following the advise from Previous Contributor @ jeffreythefrog before exploring the above