One of the greatest benefits in the life of a Christian is that self-control is a Fruit of the Spirit. Every addiction is an attempt to make bad feelings go away, and overeating is just the same. But God does not want us indulging in vices or bad habits to feel better, He wants us to come to Him and allow His Spirit to minister and heal us.
Galatians 5.22-23: But the fruit of the Spirit is love, joy, peace, longsuffering, kindness, goodness, faithfulness, gentleness, self-control. Against such there is no law.