What is the year and model of your macbook?

I had a similar gaming rig in the past, but a desktop. `But it might work. Here’s some things that worked randomly in my cases when similar stuff happened. Turn it off and on……. Just kidding. BIOS reset by removing the CMOS battery on the board, if your laptop is easy to get to the board, leave it out for like 5 mins. Cut all power while doing so (yes, disconnect the battery). Check the clock speeds on your GPU with MSI afterburner software. If the clock speeds are in the hundreds then you have a problem, Like when I used to own a laptop, it meant wiping the entire drive and that helped. If so then at least try to do system restore. Let me Know if at least the BIOS reset helped.

Does the dfu mode even show up? How about pressing up, then down on volume, releasing them and instantly holding the power button. IDK just guessing at this point.