The measure of successful behavior is not whether you feel powerful. That’s just adrenalin, which is why you feel more powerful when angry, even though you are rarely able to act in your best interest or with your full intelligence and better judgment. Adrenalin power is temporary and usually resolves in depressed mood, even if you attempt anger management techniques.
The measure of successful behavior is not whether you feel good or bad. Endorphins (the pleasure hormone) and drugs make you feel good and cortisol (the painful hormone) makes you feel bad.
Behavior is successful if it makes you feel authentically you, that is, if it is consistent with your deepest values.