Cannot Update to latest Big Sur

As stated above, I cannot upgrade to latest Big Sur (11.1) because my snapshot is broken. I've done anything dortania guide still can't get it to work. So I just fresh-install it all together. I have to fix these cause it's pain in the arse to download 12gb every time update came out

Everything works; even FaceTime and iMessage. I'm using 0.6.4 tho, been using my EFI since Catalina. I don't have time machine backup so I can't go back to APFS Snapshots as dortania guide told me to. I'm using this hack with Windows 10 in the same HDD, might be the issue? idk. never had these problem until Big Sur.

Specs:

Acer E5-476GProcessor: Intel Core i3-6006U 2.0GHz

• Memory: 8GB DDR4 Dual Channel 2133MHz
• Integrated GPU: Intel HD Graphics 520
• Discrete GPU: Nvidia MX130
• Audio: Realtek ALC255
• Storage: HDD Seagate 5200rpm (default one)
• Ethernet Card: Realtek RTL8111
• Wireless Card: Intel 3168NGW
• Touchpad: ELAN0501 I2C
• Keyboard: PS2 Keyboard
• Resolution: 1366x768@60Hz
• Bootloader: OpenCore 0.6.4 RELEASE

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https://preview.redd.it/f5a9f1kgpu561.png?width=594&format=png&auto=webp&s=bd321166804c57dde55c0bd149802990a070da4a