Windowless fullscreen now runs like garbage when it didn't used to. Windowed runs flawlessly. Can't find fix

Issue Type (Required):

Performance

Issue Description (Required):

I’ve tried every setting change i can manage and even some file editing to try and find the sudden cause of the blurriness then moving my camera around the mourningstar. Windowed mode works flawlessly like fullscreen used to. I’ve made sure my drivers are up to date, i’ve reinstalled multiple times, i’ve killed other programs like browsers and discord while playing (didn’t used to be a problem to run them at the same time). I’m at a loss and unsure what’s going on. I can’t really play the game anymore until this is fixed since anything other than fullscreen keeps sub-barring while i’m playing. Anyone have any idea the cause? I’m on AMD equipment. This problem has only cropped up in the last month.

Build:
Windows 11 home edition
AMD ryzen 7800 x3d processor
TUF gaming B650E motherboard
32 Gb ram
AMD Radeon RX 9070 XT

[PC] Do You Use Mods? (Optional):

No, I don’t use mods

Reproduction Rate (Required):

Constant (100%)

Platform (Required):

PC - Steam