I’m sorry you had a bad experience. However, it’s not that one deserves torment for existing, it’s that one deserves punishment for sin. If you look at the state of the world, it’s filled with sin. Societies cannot function because of greed, people are oppressed, madmen have nuclear bombs capable of destroying the world, and the constant suffering in Gaza and Ukraine, humanity is inherently evil. And we all have participated in that evil in some kind of way. Asking for forgiveness and trying to do the right thing isn’t a bad thing, it’s the correct thing.
With churches being toxic - every environment is. It doesn’t make it right. What people identifying as Christian do and act doesn’t represent Christianity as a whole. People will abuse children regardless, whether it be in schools, etc. I don’t live in the United States, I live in the United Kingdom, so I cannot speak for there.
Homeschooling isn’t a Christian doctrine. I personally think it is cringe retreatism and a good way to create an atheist.