Blurry image
I’m not sure exactly what the issue is, but if you don’t like blurriness then disable postprocessing and depth blur in the graphics settings and don’t use FXAA as your antialiasing setting.
Make sure that in the graphics settings it is set to “native” sampling and not “sub sample”, because that would cause blurriness.
I am a little confused as to why you purchased a new monitor with such a low resolution though? Surely you could get higher resolution for cheaper? What is the screen size (in inches) it could just be that the screen is too large for such a low resolution resulting in things looking very blurry.