I think it's okay to ask questions. I don't think everything is answerable though.
Peace doesn't mean you won't have problems. It's means problems won't have you.
God is not bothered by your persistence. Keep asking.
Believe the best about people. Pray for their short comings. You are not the standard. We all need grace.
For me, I want to change the way people see the world. That's why I do what I do...with every email, text message, and every phone call that I get with people saying "Man what you've done God has used it to change me" that's when I see success.
I would say you've got to find your identity in God - in God alone - because everything else is a false sense of identity. He's the one who made you, he's your designer and your work and your value is found in him and not in anything or anyone else.