Snipers shooting me from outside of the view distance, wtf.. Is there any way to make the visibility better?

Start the mission with night vision goggles in your equipment and use them when needed.

I always start with night vision goggles. They work great in sewers, but in the Siberian outside they only make the visibility worse.

Well, got through that section by using flashbangs to blind the snipers. Ofc this is a tactic that only works once I know they're there, which means after reloading a save....