5700X3D, 3080, and a 1080p 27" display.
1080p 27" is a little blurry to start with, sub 100 PPI pixel density if I recall correctly.
Some of this is likely to be game settings or graphics driver settings, but you haven't provided nearly enough information for assistance.
As mentioned, make sure you set the game resolution to Full HD (1920x1080). You will want to make sure any odd global settings like Nvidia 3D Vision are disabled. Also check your monitor's on screen display for any anti-blur or eye care protection settings, just in case.
If we can't see the problem, going to be hard to help.