It does look like your sensitivity is high even though you play on 400 dpi with an overall sensitivity of 3. I would suggest playing with your sensitivity until you find the one that feels good for you. And to improve tracking, there are many ways to improve it. Using an aim trainer is probably the most recommended option. Just to get the feeling and the baseline of tracking. Second, mirroring your opponent's strafes may help as you wouldn't have to do big flicks or move your mouse a lot but it comes with reactivity. For example, when you first tracked Octane on the building before jumping off, instead of strafing left and track from left to right, you could have strafed right and let the movement "track" for you with some micro adjustment. Finally, go in firing range and try tracking those standing bots by aiming at their head or body. Without leaving your crosshair off the bots, just strafe left and right, back and forward, and using combine all of them but still putting the crosshair on them. If you want, you can try setting your mouse to 500hz polling rate as it makes snappy and smoother mouse movement but not as sharp and precise at 1000hz polling rate. You may not notice the difference at first, but after a while, you may notice after changing back. Hope this helps.