"could always adjust dead-zone a bit more to get a more instant reaction or it could be the display you're using. My TV for xbox has a longer Response time vs my PC monitor but I've adjusted to it.
Hope we all helped in one way or another or at least gave you an idea on what you could try."
@iBlockHead you are onto something there. While talking about speed in game. Op states 3 is where he is comfortable. That is going to be slow and if playing on console with an older tv, even a year old there is a built in response time factor as well. Even the best OLEDs currently only offer 4ms input response time.
I switched to gaming monitors for me and my kids about 3-4 months ago and with <1ms-2ms response times the games have opened up. You still have to deal with in game lag, but for the most part the response time is super beneficial in almost every fight.
I have my sensitivity cranked to max and adjusted for ads.
To the op have you adjusted your ads sensitivity to your liking as well? I would recommend spending time in firing range adjusting your FOV as well at minimum I would recommend 106.
TO be quite honest other FPS games(COD,Battlefield hell even TF2) feel slow in comparison to the speed with which Apex moves at. Hence upping your sensitivity to be able to compete.
Positioning and all of the other stuff does play into it, but if you are engaged in a battle with anyone and their settings are maxed out and they have good aim they are gong to win the fight. TTK is quick in this game and if they are hitting you faster than you are hitting them they will win.
Practicing with other people in firing range may help, I can't really speak to that I learned my Apex curve in game prior to there being a firing range. I just use it now to re-calibrate my sense of distance for sniping with Iron sights.
Good luck.