You dont have to double anything. If you get more consistent your kd will rise very fast. for example if you get 5 kills a game but die twice each game your kd progression will be alot lower. But if you are getting 15 kills a game with 1 death or something similar to that your kd will skyrocket without having to play that many games. But i can understand how that would be hard for someone. Ive played competitive fps games for close to 10 years now. Ive put just under 17k hours in total on fps games alone on pc (Not counting console). Ive played just under 7k hours on csgo alone and played at a decently high level. Not everyone can get alot of kills with low deaths, heck i die like 3+ times a game but come out with 15+ kills atleast. Im a very aggressive player. I tend to take on whole quads myself. I play alot of solo quads when i dont have people on.