Back when I still played COD (last COD game was WW2 so not that long ago), I had no problem with campers.
You like to camp, good for you, you good at it? Well even better.
I found people moaning about campers were the real players without skill. I mean, YOU KNOW WHERE THEY ARE!
And if you cant get to them or kill them then avoid them. It's called adapt!
As a matter of fact, if a guy camps so well that he forces you to abandon certain parts of the map, then well done to him!
When I had friends that played COD (COD BO2) each one had a role to fill (think it was like only 2). Two guys were campers that defended the spawn and choked one or two lanes. Rest of team were run and gun.
It worked out unbelievably well. The other team effectively had less room to move/attack from and this gave our "attackers" more room to safely move in.
It was never about who got the most kills, it was about WINNING. Campers had best k/d ratio but never very high kills and end score thus call streaks were seldom used.
Some were better at run and gun (better reaction time) and others better at camping (better at anticipating enemy movement).
Even though TDM isn't really objective based, we made it fun as hell.
I myself, like to play both. At times I like to just run around and shoot people and on other occasions Ill open a beer, relax and wait for them to come to me