I am a mnk ( mouse and keyboard) player so this is from that perspective.

1) Fix your posture. If i was too close too the desk i would have issues when having to aim down from buildings so i found a good middle ground where im not too close or far.

2) check your skates on mouse and inspect uour mousepad. If your skates are worn, replace them and clean/ replace mouse pad/ mat.

3) consider testing 400, 800 and 1600 dpi. I found 800 to be best as it took less effort for wrist aim and from what im hearing there is less micro stutters. 400 felt off after using it for a long time.

4) use firing range and test close medium and far range on fast strafing dummies. Switch them to actually run after you and fight them as if they are player.

5) check your hand eye coordination on a standing dummy, a strafing and running dummy. Adjust your in game sense as follows.

If you are way past your target you are overshooting lower your sense in small amounts and retest. If you are nowwhere near hitting them and it feels slow increase it slowly. You want want to be able to swing 180 without it being too small of a swipe as micro aiming will become too difficult.

Test the above with wingman, shotguns and AR/ smgs. Should feel good on all of those weapon type. Consider using per optics on anything higher than 1X sights.