Everything (not textures) looks fuzzy

Everything in the game looks fuzzy. I don’t know why. In the Unity Editor, everything looks sharp and crystal clear, but once I build it, and go fullscreen and full resolution it all looks fuzzy.

Can anyone help?

What it’s supposed to look like:

What it looks like:

Trust me, it might not look that fuzzy in the picture, but on my monitor it is very noticeable. Open the images in new tabs and compare.

I suspect that you might be talking about anti-aliasing. Try disabling that in Quality settings and see if that makes a difference.