The story of Samson is messy. Morally, he's all over the map: breaking vows to God, murdering and stealing, complaining against God, lying, and marrying non-Israelite women on multiple occasions. So how is it that he's considered a heroic figure in the overall plan of God to redeem his people? It's because GOD is the one who gains a victory, even if it comes through the actions of a morally confusing character like Samson.