It is important to realize that our behavior comes from somewhere. Bad behavior is like the bad fruit of a bad tree with bad roots.
You can spend your entire life dealing with outward symptoms, but the bad fruit will manifest somewhere else if the root is not eliminated. The principle never fails: rotten fruit comes from rotten roots, and good fruit comes from good roots.
To really deal with bad fruit, you must follow Paul's admonition to the Colossians to be "deeply planted" in God.
You may need to carefully examine your own roots. If they were unpleasant, harmful or abusive, don't be discouraged; you can be uprooted from that bad soil and transplanted into the good soil of Christ Jesus, so that you become rooted and grounded in Him and in His love.
Remember, uprooting can be painful. Being replanted and becoming rooted and grounded is a process that requires time and effort, but it is by faith and patience that we inherit God's promises.
My prayer for you is that you will be deeply planted and rooted in Christ, producing good fruit wherever you go!