Blurry looking grainy effects on MHW display can be solved with few settings changes.

Upscaling

1. Open Menu and go to Options > Graphics.

2. Change:

• Upscaling (Super-resolution Imaging) to AMD FSR 3.
• Upscaling Mode to AMD Native AA.
• Upscaling Sharpness to Maximum.

NVIDIA Sharpening Filter

Use this guide [https://reddit.com/r/nvidia/comments/16qsagv/guide_how_to_reenable_the_image_sharpening_option/] to enable NVIDIA Sharpening Filter.