I’ve heard it said that our earthly father shapes our view of God. This couldn’t be more true, at least from what I’ve observed. We seem to base our expectations of who God is and what he will do for us based on who our father was and what he did for us.
If your father let you down, you are probably expecting God to let you down.
If your father was generous, full of laughter, and always kept his word, then it won’t be as difficult for you to believe that our Father God is all of these things.