Diagnosis
At 27 inches and 1920x1080 resolution, the pixel density is relatively low (about 82 PPI). This can make text and fine details appear less sharp than on a higher-PPI screen, but fuzziness often points to a scaling or sharpness setting issue.
How to Fix It
First, press the joystick and go to the OSD. Navigate to Picture > Picture Adjust > Sharpness. The default is 50. Try increasing it to 60-65. Don't go too high (above 70), or you'll get ugly edge artifacts. Next, on your computer, ensure it's set to the monitor's native resolution (1920x1080). In Windows, right-click desktop > Display settings > Scale and layout. Try setting Scaling to 100%.
If That Didn't Work
Use Windows ClearType. Search for "Adjust ClearType text" in the Start menu and run the wizard. It will walk you through picking the text rendering that looks best to your eyes. This makes a big difference for text clarity specifically.
Heads Up
This is the inherent trade-off of a large 1080p screen. For razor-sharp text, you'd want a 1440p or 4K monitor at this size. The fuzziness you're noticing is likely the visible size of individual pixels, which settings can improve but not eliminate.