I'm quite new to the game so I have only played a few Hazard 4 missions so far, but I seem to struggle quite a bit there. I take too much damage and can't seem to keep up with killing enough bugs.
My question is, once you have unlocked the guns/equipment, there is nothing else to get "stronger" right? I mean apart from some Overclocks perhaps? So is it only a "git gud" thing, or is there any advice how to go about these harder difficulties?
Edit: Thank you all for your great advice! I've played through the Assignment "New Hazard Level: Lethal" and the recent Deep Dive without any real trouble. Rock and Stone!
Elsewhere in this threat you mentioned that kiting can be tough if the terrain isn't great. To that end, one of the first things you can think about when you enter a new cave/room is "if a swarm breaks out while we're in here, where should i run to?"
Having that plan ready to go is excellent for preventing yourself from falling into situations where you can't move around and kite well, since you always have a moment to prep before a swarm actually spawns