Display screen pixels flicker, especially on edges - entire screen pixilating as well

Just my 2¢. On a Desktop PC, just with the Nvidia GPU, there is no point to have the

You have the

as a symlink to the /etc/X11/mhwd.d/nvidia.conf - and that is the only one important actually.
Your current issue is this with it

Same issue as one that was talked on this topic

You should be able to follow along and sort it out.