Blurry can be a lower resolution, or like my 1080ti install, the system reverted to a RGB color signal which causes outlining and less-than-ideal picture quality than say YCbCr444.
IF you are using a HDMI cable, you might need to go into the TV settings and select a non "PC" preset i.e. Samsung->PC-->EDIT-->Gaming Console and save, and use a "Gaming Console" preset or similar but be warned it might auto-reset at times as this is a current issue I'm having. I can tell by my log in screen if it's reverted or not at this point, so just a heads up. That'll allow the TV-side settings to unlock like HDR, dejudder, better sharpness, etc. Had a higher-end Vizio before that needed a similar treatment.
Both sets, auto-detect a "PC" and will...