Why does your abuser act like you have no good opinions and can say nothing right?
The abuser makes a critical psychological mistake called assumption. He assumes it's ok to abuse you. Why is it ok to abuse you? Because he makes another assumption: you are always wrong. He is predisposed to it. Also, he assumes that you are weaker; thus not only are you always wrong and he always right (according to him, because of another assumption: the strongest is always right), but you also cannot defend yourself. You do not have the power. Mind that this is all only in his mind and that none of the above is usually (if not ever) correct.