macOS Catalina 10.15.17 supplemental updated released 11/5/2020 bricked my 27" late 2013 iMac!

After my iMac automatically updated 9 days ago I had a week of technology ****! first sign of trouble was seeing a black screen with a no entry sign. a shut down and start up felt like things are okay then infinite beachball spins started repeatedly. Then back to the black screen with the "do not enter" sign. A few disc repairs and no luck. a recovery and reinstall and it works for a day and then the updated installs again and back to square zero. A clean install of Catalina with formatted hard disk and still no luck. I did a Mojave clean install and the issue resolved. It eventually dawned on me that this is probably related to the supplemental update and another clean install of Catalina, turn off automatic update and no issues. Luckily I had everything backed up on a time capsule.

My 2016 power book pro took the updated no issues and now it is running Big Sur. Big Sur is not compatible with my 2013 iMac. So Catalina it is. How can I get apple to fix the supplemental updated so it doesn't brick my iMac again?