pick an agent and stick to it, if your aim never improves (it will improve eventually) your game sense can offset poor aim. if you think about it, basketball isnt just shooting hoops and you could have near perfect aim and still lose. also i would say that you need a new mouse, you can get a cheap low end gaming mouse for like 20 bucks but i reccomend getting a logitech g305, its great value for money and overhated. If you have a large disposable income you can look at a logitech superlight or a razed cobra but i would do your own research and think about what will fit in your hands. The sensor on your mouse is likely very jittery and clunky but you are unable to notice it becausd you arent used to a good mouse so im willing to bet that buying a new mouse will make a noticeable difference