here is a protip, grab a pike, stab his horse, aint nothing any cav can do about that.
The strength of cav has ALWAYS been killing off unaware player in hit and run attacks. Well, lancers anyways.
A little battlefield awareness will go a long way towards surviving cav attacks.
Also, don't keep counting how strong a class is in terms of how many kills it gets. Important is WHO it kills, if its just peasants then its not such a big deal to the team. If its cav killing people running around by themselves without any anti-cav support then its their stupidity.
The strength of cav is that they can hit stragglers and they do hit and run.
Hit and run means you stab one guy and when people look at you, you ride off. 20 seconds later those people have forgotten about you and you can kill another one.
So instead of whining about it, how about instead of running around 1 by 1 and splitting into many tiny groups, you do a little teamwork.