(1) Anachronism. While I agree there is great value in the Talmud, but I do not see it as the system of law that was in place during the time of the prophets of Israel.
(2) Right and wrong are not dependent on what people think. Nor do they depend of social conditions or upbringing. They are not relative. The reason this is so is that relative morality is logically incoherent. It can not claim its own truth without contradicting itself.
(3) G-d commands us things to do in the Torah because these things correspond to a natural order that he created. They are not good because he commanded them, and they are not arbitrary.
Abuses of rabbinic power are swept under the surface. It is hard for a person who wants a clean conscious to be part of a word that has a guilty conscious and is more afraid of the light of truth than the darkness of lies.
The reason it seems to me that people are afraid of the truth is because in fact as Nietzsche said "the truth is terrible." We live in a harsh world and we ourselves from the aspect of our animal nature are terrible beings. And we use the appearance of morality to cover up our savage, cunning, violent, lustful, sadistic nature. But what makes this all the more terrible is the meaningless aspect of it. We are in a desperate search for meaning. So the Ultra Orthodox world will do anything to guard the sanctuary of what they think gives them meaning. This is where I disagree with them. In this issue I am a monotheist--God gives me meaning. I do not need to find it anywhere else.