if someone's complaining about the way you spar then you're probably doing something right
I actually love when people do it
sometimes I just watch Sarah spar and laugh with her in guild messages about how people complain about the way she chooses to spar

or when crazy people tell me I delay or hack to win spars, I don't even argue
I just ignore or agree with them because it rustles their jimmies even further
sometimes I even apologize for lagging when it's the other playing who is lagging, because I'm aware of how clueless the majority of the spar community is when it comes to understanding how that works (see first quote in signature)

easy mental/emotional edge
have fun sparring someone who you've managed to convince yourself has some sort of unfair advantage over you