No matter how our parents behave to us, we are commanded to honour them. One thing about God's commandment is that, It brings about fulfillment of promises to them that diligently follow the instructions given by God.
God has promised us for a long life, but He also required us to honour our parents so that our days may be long
Honor your father and mother, which is the first commandment with a promise,
Ephesians 6;2