only way you improve is by playing more yo
quick tip: if you want to get more kills in ctf/dm modes, switch to the pistol (as well as knife, if they are in range) - and practice too, 1v1s are a good way to train - an example here: http://youtu.be/bSmjzbAI414
use of cover is important too; playing sniper in dm/ctf is all about staying alive after your first (sniper) shot, unlike osok
quick tip: if you want to get more kills in ctf/dm modes, switch to the pistol (as well as knife, if they are in range) - and practice too, 1v1s are a good way to train - an example here: http://youtu.be/bSmjzbAI414
use of cover is important too; playing sniper in dm/ctf is all about staying alive after your first (sniper) shot, unlike osok