complaining that you weren't submissive enough is not valid. it is like any other characteristic, and if you chose to be with someone, well, there must be a reason. besides, what scale is this guy going by? and how does he know that there is anyone more or less submissive than you?

personally, i like a challenge. dont worry about it. chalk it up to experience, and continue to grow. above all, dont accecpt that idea into yourself. you are perfect in yourself.