I wouldnt say it's worth buying if you can't adapt to the scope.
Tips:
-please aim, most people just spray their semi auto snipers, DONT, not even in close quarters and not even if your life depended on it
-i know this one's obvious, aim for chest until you're so used to the scope that you've memorized it by heart, then aim for head
-perfect practice makes perfect, not practice, perfect practice. So make sure you hit even if you have to take your time. This way, you'll get better and better at aiming. If you don't try your best to aim, you won't get better as fast or you won't even get better at all at aiming.
-keep a cool head, people will try to make you angery and lose your cool. No matter what, don't lose your cool! If you lose your cool, you lose your aim, I learned that the hard way. When you're really angery, try focusing on something else, like killing another opponent or what gun to use when your present gun expires.
That's all the noob tips I can give for now, hope it helps. Remember, draggy's usually 2 hit KO usually! Have fun!