To preface, I’ve tried all the previous guides about ‘mouse fixes.’ Raw input, FSR @ 0, dynamic resolution, ensuring Windows had accel off, controller smoothing off, etc.
I did some basic testing with the three mice I had on hand and found that OW2 has bizarre mouse behavior at polling rates above 500Hz, which I can best describe as ‘mouse deceleration.’
I tried the mice via wired, USB dongle, and Bluetooth, and the polling rate was the only thing that made any difference. Seems like at 500, 1000, I get the mouse accel/decel, but 125/250 don’t have this issue, or at the very least, it’s happening on such a small scale that it’s not noticeable.