1 Samuel 15:23 KJV For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry.
1 John 5:21 KJV :  Little children, keep yourselves from idols. Amen.
Sometimes our prayers against the forces of darkness are to no avail because of continual sin in our lives. Sinning willfully is witchcraft and idolatry in God’s eyes and so we shouldn’t be surprised if we succumb to habitual sins(idols) and our prayers against “actual” altars don’t work🤔. One cannot fight evil with evil. Let us make use of the grace of God available in our time which empowers us to abstain from sin.