Have you heard of the concept of learned helplessness? Learned helplessness occurs when a person believes that they have no control over their life and are unable to change it, and so eventually they give up and stop trying to altogether.
I am now a card-carrying member of the Happy Eaters Club. I've found a way of eating that works for me and is totally sustainable over the long-term. I'm consistently well-nourished and never feel deprived or like I can't eat enough to satisfy my hunger.
Your past is past and it does not determine your future.
But the past can be heavy. All of us have been hurt, we've been rejected, and our sense of self-worth has suffered. We have shame, we have regret, and we have guilt. Some of us have had big past trauma.