rider stop QQ without knowing how the game works.
If you want a full speed bonus the enemy has to move towards u. Means when he attacks u and moves in ur direction while u come with full speed the damage to your horse will be incredible... But if he just stands there or is even running away from u the damage will be bullshit - no matter if you hit him or he hits u. the thing is just everybody moves forward when u attack someone.
I haven't seen u playing cav before, so u probably got no idea how this class even works. You don't know how to hit, u don't know when to hit, you don't know how fast u should be, u don't know when it is better to couch/do a normal hit and u don't know where to hit. Learn the game before u start raging. You probably don't even know how long u should hold the hit to get max dmg.