If God is all knowing then she or he violates everyone’s privacy.

 One reason to think God’s existence isn’t valuable (at least for certain individuals) is based on the idea that God violates everyone’s privacy.

If God exists, then there is a sense in which God automatically violates our privacy (that is, if God is all-knowing, then God knows all of our mental states/thoughts). 

Without a justifying reason to violate a person’s privacy, this is an aspect in which God’s existence is a bad thing, for part of what’s involved in people forming trusting relationships with each other is that they choose what information about themselves they reveal. 

But this type of choice is impossible for individuals to make in the case of God

The thought is that in a world where complete privacy is impossible, where one is subordinated to a superior being, certain kinds of life plans, aspirations, and projects cannot make sense… Theists sometime claim that if God does not exist, life has no meaning. I am now suggesting that if God does exist, the life of at least some would lose its meaning 

Many theistic traditions hold that humans were created solely to fulfill God’s purposes for them. If this is true, then humans aren’t permitted to pursue their own ends; they are obliged to pursue the ends God has set for them. Hence, the existence of God violates the dignity of humans.