What values did you try for deactivation delay?
Tried everything from 200, 300, 600, 700, 1000 ms
I'll be honest I'm not quite sure if I was doing it right since I've never used the deactivation delay before.
My ST was pretty much standard. 22 Hip, 15 ADS, 4000 DPI on my mouse (felt the best imo), no curve, everything else default values except for the button remaps. Settings in game were as the configuration guide says (Insane 20 H/V Sens., Low/High Zoom Multi 2.0, Standard Aim response curve)
I had to go back to the profile with the original ST since I kept that thankfully.