Camping, run-and-gun, etc...they're all part of the game.
Camping is a valid tactic, but unfortunately this game really gives too many advantages to campers and punishes a run and gun style.
A perfect storm of bad design decisions and issues just make it really frustrating:
-Footsteps being hyper loud, making it impossible to sneak up on people (not to mention Dead Silence not even working at launch)
-Map design creating some really awful spots on maps, kill lanes, and camp spots where there's only one way in or out. There's many spots on the map where it is almost impossible to dig out an opposing player, especially once you've thrown your only grenade.
-Skill based matchmaking that makes every game difficult (encouraging people to play more passively). I'm totally against people who pubstomp and support SBMM overall, but this feels so strong. Basically every player I play is almost exactly as good as I am, which makes every gunfight come down to the person who shoots first winning (unless there's lag). So, if I want to go positive, I better camp and be in better position.
-Gunshots not showing up on radar directly anymore - you just get a general direction and distance.
-Spawns flip a lot less (if at all on some maps). Makes camping a particular area a lot easier
-Weapon balance in game is a joke. There's a killer shotgun and the M4. Nothing else is viable, so people run the perk with that lets them use both the best guns.
I'm not anti-camper, but there needs to be more balance like other games had. I feel forced to camp too often. I don't need to always be sprinting around in constant action, but the pace of this game is just too slow at times. TDM matches regularly hit the time limit.
I think it can be adjusted and give a little more balance to aggressive play. Some maps are just awful to play.