hey APPLE COMMUNITY i just upgraded to the new MACos Monterey and now i want to go back to Big Sur because FL STUDIO doesn't work properly on my mini mac . any advice can i downgrade with a big sur usb installers and how do i do that ?

The basic outline of the process:

1. Create bootable installer of the desired OS
2. Erase the internal drive and re-install the desired OS
3. Restore data and apps from a Time Machine backup or clone.

How to create a bootable installer for macOS - Apple Support

Restore your Mac from a backup - Apple Support

Try Recovery mode.

Use macOS Recovery on an Intel-based Mac - Apple Support

Option-Shift-Command-R will install thee version of macOS that originally came on the Mac.

If needed, you can then upgrade to Big Sur.

How to get old versions of macOS - Apple Support

I have exactly the same problem. I read the article: "How to create a bootable installer for macOS" it says "These advanced steps are primarily for system administrators and others who are familiar with the command line." I don't think I can handle it. I hope Apple'll do something for us, I can't handle "Terminal". Please show us easier way to downgrade to Big Sur if you can't do anything on Monterey.

Thank you so much for your help. I'm sure I can handle this problem by using macOS Recovery ( Option-Shift-Command-R) to reinstall the original version of my Mac, then will upgrade to Big Sur, as you suggest. I really appreciate your reply. Arigatoh.

I have exactly the same problem.