Originally posted by Jackie Daytona:

does your resolution match your screen, if not it'll make it rather blurry n seem off.

Yeah, this. Monitors have a "Native Resolution" and if you've changed that or the game is selected to a different resolution it will be blurry. If you aren't happy with the SIZE and changed resoution to fix that, change it back. In the Settings there's a SCALE setting that lets you change the size without screwing up the resolution.
Also might turn off Motion Blur, Cromatic Aberration, and Depth of Field. Play with them and see what looks right but the big one is get the resolution of your monitor correct.