I usually leave the pixel filter alone
I have it on gaussian with standard settings.... It usually doesn't pixelate if you have the lighting set up right.... It's either because of the pixelfilter or your camera has DoF enabled....
Check the "Scene" Panel (right side) and click on the camera, then check below the scene tab in the parameters panel if there is depth of field enabled in the "Camera" settings:
View attachment 54849
p.S.: Also you're not bothering me
We're here to get help and help each other as good as we can
So yeah, if I can help you with something and I have the time for it I'll do it, else I'm just not answering
Edit: And sorry for these small screenshots and the compressed interface, my laptop is only 720p