No signal after verbose unless I use mini displayport

On my hack, I'm currently running Sierra, as in High Sierra and later, I just get no signal after verbose unless I use Mini DisplayPort, to use HDMI or DVI I have to run Sierra, which is an issue for me, as I no longer have access to a mini displayport monitor and my monitor hooks up via DVI, and since Firefox has recently ended support for Sierra, I want to get Big Sur or Catalina working. What could I do to get it working? I've attached my config.plist.

Author: Lost-Entrepreneur439