Getting a Black Screen after Big Sur update from Mojave

I followed the update procedures to update from Mojave to Big Sur with the help of the Discord community, but after installing, now I have a black screen. I can boot to recovery just fine. I tried troubleshooting my GPU, R7 240. I didn't know what to do since this graphics card worked just fine in Catalina and Mojave.

Note: I use WhateverGreen 1.5.1 because after that, 1.5.2, that caused black screens even on Mojave and Catalina. 1.5.1 is not that outdated, it only released in August. But, I do use the latest versions of everything else.

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Specs:

 CPU : Intel Core i5-4590 3.70 GHz Dual-Core Processor Motherboard : Gigabyte GA-H81M-S2PV Micro ATX LGA1150 Motherboard Memory : Patriot 4 GB (1 x 4 GB) DDR3-1600 CL11 Memory Memory : Patriot Signature 8 GB (1 x 8 GB) DDR3-1600 CL11 Memory Storage : Seagate Barracuda 250 GB 3.5" 7200RPM Internal Hard Drive Storage : Toshiba P300 1 TB 3.5" 7200RPM Internal Hard Drive Video Card : Gigabyte Radeon R7 240 2 GB Video Card 

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here is log