The better team won. Even though they got lucky with how they game played out, they made the most out of their breaks.
The turning point of the game, there were at least two. The fumble by Blunt when it was scoreless, gave the momentum to Atlanta. Before they could compose themselves, New England was behind 14-0. Then the interception and it was 21-0.
New England was barely hanging in still, until that 3rd and 1 play where they got to the QB for the fumble at the 25 yard line, and a TD after that. That turned the game.
Atlanta had one more chance to put them away. A great throw and catch along the sidelines, that should have been it. But Atlanta could not put them away, and looked what happened, the greatest comeback in Superbowl history.
The NFL is still a really good product.