Eh, you didn't do too bad, you were playing with Master Guardians (at least on our team) and you're fairly new. Most important thing is to pay attention to the map and be able to decipher weaknesses in our defense (if we're defending, either hostages or the bomb). I saw you were covering the same spot as someone else more than a few times and that resulted in either their death, or yours. Just gotta watch out for places.

Also, aiming, that's something you need to practice, but everyone needs to learn to aim better, that's just a general thing.