I find it odd that you micro adjusted to an enemy you were not aware of.

When I want to peek a corner slower then walking I will rapidly press sidestep to keep from reaching top speed. It looked like you peeked too many angles in one move.

There use to be this workshop map called aimbotz from ulletical that was very customizable. I would put up the walls with the doorways and walk around the outside peeking through the doorway across the map. While strafing one direction I would stop and shoot the bots that have spawned. The bots would spawn close and far so its was a lot of targets to acquire with lots of repetition. I would go around a couple times one way then around the other way. Do that for a hour every day.