I dunno, i've never had that problem, if my partners suck in bed I usually don't stick with them for very long.
Kinda funny, you sound like my ex in this thread, she always comes to me to complain about the inadequacies of her current lover. I admit it does my ego good that she just has to compare everyone to me but it's annoying at the same time cuz it just reminds me that no one is utilizing my talents