Teen defiance is neurologically driven. The adolescent brain is wired to push back against perceived control as part of the developmental work of individuating. This is not pathology. It is development. The intensity of the defiance is often proportional to the intensity of control applied. Understanding this changes the parent role from enforcer to consultant, which paradoxically produces more cooperation.
I am not here to control you. I am here to be honest with you about what I need and what I see. What you do with that is yours.