There's more to skill than just being able to aim.
Players can ride their IQ in FPS games much higher than the average no-brain aim player because they actually think about what they're doing.
If you just run-and-gun it everywhere without any consideration, you're relying on everyone else being as equally good mechanically as you, and equally dumb as you with their decision making, and that's why you're at a peak where you feel no one can "hold a gun" properly.
Maybe you should learn to improve your decision making so you can climb higher, and be on par with people both intellectually and mechanically?