How to stop camping?

I hope it is more than just me but there is a serious problem with camping in Halo 4. Is there something to be done to stop this from happening? It feels like every gametype that I play just ends up in kids camping and me raging. I appreciate that SWAT has been added but with people camping in SWAT it is absolutely no fun.

Also, this isn’t the only way that matchmaking is broken. I play in a party of 3 people because those are the friends I’m able to play with frequently and in everything but Dominion we get matched up 4v3 consistently (literally game after game). Some kids were talking -Yoink- and we played em again and we didn’t pick up a 4th so we just lost because the extra shots matter that much.

What happened to X’s? Is there any good reason that these should have been removed? (Yes, I realize they are on the mini map but I want a legitimate X that I can call out not an X that has a range of -Yoinking!- 25 yards).

Slow the game down, add X’s back, and add a sniper playlist please.