why is CSGO so hard?

a lot of things go into making a good player. aim, movement, positioning, map awareness, knowledge of guns, etc. being a better player is not as simple as having better aim than your opponent, it can be things like abusing ping differences, knowing one way smokes, etc. i played 2 seasons of esea-main and my aim was never as good as some of the top players, but i still competed just fine due to the fact that i could beat them in other ways.