Hello I am Wallsh and I am going to show you how to improve your ability to murder in darkness. I will not be going over graphics card settings or any sort of contrast/brightness changes but some more practical things that some people over look.
#1. Clean your screen! A lot of my friends have this issue where their screen is just nasty and makes it very hard to see. To clean your screen all you need is white vinegar and a 100% cotton shirt or just a microfiber cloth like for glasses etc. Take 2 tablespoons of white vinegar and 2 tablespoons of water and put it into a small bowl/container and gently stir it by swishing it around. Then gently dip your cloth into the mixture and press against your monitor (not to hard) and make very small circular movements. Do not do long straight lines just take your time and gently scrub your screen with tiny circular movements.
#2. Sound, if you are running at night with no NVGs then sound is your most important tool ; I would recommend going into your audio settings and enabled Loudness Equalization. This will make the audio crisper and louder for you increasing your chances of hearing others near you.
I know this probably seems pretty basic/obvious and I mainly wrote this for a few of my buddies but I figured maybe someone else out there could use these.
Good luck and stay safe