What am I supposed to do with my dead MacMini after Montaray killed it?

Understand the frustration one is experiencing.

No where have I seen any concrete documented proof of " omitting to add the driver or forgot to inform in advance of Isn't supported " anywhere except here.

I have a 24" M1 iMac and have an old VGA ViewSonic HD second display attached with a USB-C to VGA adapter. While it will never be up to the standard of modern displays it would be fine for trouble shooting. While I can't confirm that it works with a MacMini I can confirm the macOS Monterey supports a ViewSonic VGA monitor.

DM88, I can understand your frustration, and hopefully you'll find a solution to the issue. It didn't use to be this way with Apple's OS releases, but the last couple of years or so have been brutal. I can only offer a couple of suggestions.

First, in the future (and I know this is of no help now), hold off on installing the "latest & greatest" OS release for at least six months, if not longer. Second, there are many, many folks here who are very knowledgeable and are only trying to help by first getting as much information as possible as it pertains to your system. Work with them. And lastly, try not to let the "that can't possibly be happening" bunch get to you. When Apple released Big Sur, posting, after posting, after posting here complained that MacBooks were being bricked, and it took Apple almost three months to admit (actually, I don't think they ever did) that upgrading to Big Sur was bricking MacBooks. I've been a user of Apple products since the original Macintosh. There have been hiccups of course, but the last few years have been nothing short of brutal.

So, your mini works fine except you have an external peripheral that doesn’t work with the OS.

Get a new monitor or revert to an OS that works with your monitor.

Same here!! MacMini bought July 2021. Updated Oct 29 To Monterey. Now it freezes on start up. Unplugged everything. Reinstalled 2 times... nothing :(

Any suggestions?

Mac Mini M1 updated from Big Sur 11.6.1 to Monterey 12.0.1 HDMI to Asus 27" and all is fine here

Then there is a problem with the cable connecting or the monitor.

Check with a new monitor, or change the cables..

Use a cable by Apple or Apple certified. Better would be the former.

used to have the same problem with my mac book and smart TV.

Ultimately the problem got solved by getting the USB to HDMI connector from apple.

That is why all the additional devices are to be disconnected when upgrading to a new Operating System or reinstalling a new OS.

This is the standard basic of the whole process.

Although every OS has its software glitches, but we can not blame everything on it.