Maybe Protestants are "deficient" because the majority of them were founded in heresy.
At least part of the reason for the founding of the Protestant Church was the moral bankruptcy of the Catholic Church generally in the 16th century.
If there is a God, I'm sure he didn't mind them standing up to the moral failings and sins of the Catholic Church.
I agree, the church did have some corruption at the time. But I doubt that Martin Luther intended to create what eventually happened with the protestants.