its not a problem just for me, just watch a pro game, people miss prefires all the time. its how the game works. my reaction time is better than average. you need more than fast reaction time to hit people in this game. you actually need to aim at them. not 3m behind them or in front like in games with bad hitboxes and slower movement.
i dont need tips or videos for noobs. i know what crosshair placement is. even if you have good crosshair placement you still need to aim when people peek. in your case, because you have low sens, its easier for you to click people when they peek from far away. but if someone runs out wide really close while you are holding an angle, you have to move your elbow so that you can move your mouse far enough and that means you cant react as fast. its just preference. as long as you can move your mouse calmly without jerking it around, you can shoot accurately with high sens.