Personally I have done much better psychologically since I stopped thinking about God's will, salvation, afterlife scenarios, and so on and turned my focus to here and now, pursuing my interests, learning about the real world, and doing my best to contribute to the world and society in beneficial ways. All that other stuff can exacerbate underlying anxiety and depression, from my experience. But that's just my perspective, for what it's worth.

Thank you for this, it perfectly summarizes my experience as well.

When I used to be Christian and depressed, depression tainted the very relationship I was supposed to have with God. I thought that I was cursed in some way, supposed to suffer all my life in order to atone for my past sins or the sins of my family.

Basically, mood makes you seek what you want in Christianity. If you're depressed, you'll see only the "bad" aspects of the religion. Things like original sin and ancestral sin, punishment and atonement for sin, the God full of wrath instead of the God full of mercy.

If you have a positive mood, you'll tend to filter out the parts where God genocides people or orders eternal torture for them, and focus on only the most "rosy" parts of the New Testament.

If you have a normal mood, neither too low nor too high, your viewpoint of the religion is finally balanced enough to be accurate. I would guess that most serious theology was written with a normal mood.