Comp is an extremely inefficient way to improve your aim, and most comp grinders have horrible mechanics. Decision making is obviously more important than aim, but aim does matter and you're going to improve it way faster through 1v1s and (if you're lacking mouse control) aim training than banging your head against a wall in comp.
Someone just wrote to me hoping I would die... because I created Mirage, and that I would suffer. I don't know how to take these messages, but it hurts that someone can hate me so much because of a digital world I created for a game that is meant to bring joy to people.