Hello, I am unsure if you've solved this issue with doom but I had a heck of a time getting mine to work.
Tried every suggestion
Update drivers, turn off application in game overlays... list goes on.
Here's what I did.
Uninstalled all of my AMD packages, restarted,
Ran a program called DDU ( Display Driver Uninstaller )
Go in where you have AMD folders and delete them all ( not your MOBO folders though. )
Rebooted then installed Crimson 16.7.2
Ensured Crossfire was enabled and it took a few minutes but it loaded.
Although with 6GB of video ram my system can only play it on High settings.
Locked up my PC on Ultra