test range and invite people i think
you rarely find people "camping" as you do in cod. if they arent moving, its likely because they are locking down a strategic point.
this is towards no one in particular in anyway. to start to get to grips,you really have to stop thinking with your cod head on. you cannot rush in a get a triple kill on a group of people. its much, much more strategic at the best of times,
it is often better to pause, look around, use the spot function, use the mini map, see where people are headed, and then make your move. use cover, stick to side paths, dont run in the open, hug walls, etc.dont flounder around too long tho, as its likely you'll get spotted and someone will sneak up on you
it is a massive, massive learning curve, but if you have the patience to stick with it, then it will just click. the great thing is, you can still rack up the points to level up whilst being negative. ive seen people 0-12 with 6000 points on an domination game just from revives, ammo, flag caps, etc