You can still bind Mouse Left, Mouse Right to "Infantry movement - Turn left, Turn right". But it will cost a huge sensitive desync between X and Y.
Video review.
https://www.youtube.com/watch?v=M21n_do4Ack&feature=youtu.be
Upd1. Notice, that problem is not happen when zooming(hip or iron sight). Only when you rotate from hip, or iron sight(not zoomed).
Udp2. Problem exist in 70-100% range of AD value.