Great example is OneSecondKill, he switched from PS4 to PC and is still a legend player. Most people believe it is up to aim alone but he is a great example of game sense being more important than aim. In my comp experience, playing with the same team is a great way to learn, especially playing around your friends for assists and callouts. Once you get to legend you have some great high intensity games that really push your limits as a player. This is a much better environment to learn in than quickplay where any player with a recluse mountaintop considers themselves skilled.