1st off all, you need to provide your system's specs (computer model, BIOS version, chipset, CPU, GPU, audio, LAN, wireless, etc.).
Then you need to specify the boot loader you're using and its version
Finally, post a zipped copy of your boot loader EFI
No assistance can be provided without this minimum requirements.
The only thing I can confirm is that Bluetooth is often problematic under Monterey beta1 so don't hesitate to disable it to begin with.