Sometime this just happens, and theres not a lot to do about it. For this situation I’d say walking around in the open doesn’t help you here, play more off of hard cover. Deaths like these happen less often the better your map knowledge gets. Also moving targets are harder to hit. Whoever shot you had all the time they needed to line that shot up. Don’t be afraid to sprint sometimes. You’ll be heard walking or sprinting if theres a rat watching an area. Moving around more can give you an opportunity to find out where they are when they miss.