I am not bad, I cannot be bothered to level up.
I know some of you will put, "Don't be the marked man. However helpful that is it is not what I am looking for. :/
Run with your team, run close but not too close. The last thing you want is the enemy getting 3-4 kills with a nade. Keep moving and move close to cover.
Take cover in spots where you can't get backraped or flanked, try to get a power weapon to defend yourself easily, use smoke bomb as your kickback,when being outnumbered run away if possible, play with friends that will protect the marked man.
Smoke Bomb is the best kickback, I think. Except when it's acting stupid; then, it's the worst, because you basically waste 7 medals (5 for me, because I use Bargain) and still die. Those deaths will either make you laugh your butt off, or make you break a window. Sometimes I smoke bomb away and still get killed by grenades or laggy melees. Hell, I've been stealth killed through it before
It really just depends how good you are at surviving. Make sure to have a grenade on you and an escape route if you're camping. If there is no escape route, take PeteX's Riot Shield advice from U3TV and just jump around with a Riot Shield. I'm sure just about everyone has seen it but people stil can't defend against it. Most times I'm the Marked Man (it sucks -.-) so I end up finding good places to hide.
In Yemen, hide in the towers but at the back so then people can't throw grenades at you from the high traffic areas.
It's usually better to be at the highest point of the game but a place where you're protected from bullets. Therefore you can jump off the high area and run for it.
Get a Pistole and go nuts
You'd have to already be nuts to pick up a pistole.
Just kidding, I actually like the pistole and use it on Chateau a lot to get out of blindfire battles easily.
Wipe that smile off your face and get your tryhard face on!!!