Brady shredded the Seattle secondary the entire game. The nasty habit Seattle has of not playing until the second half came back to bite them square in the ass. It should have cost them the NFC title game, but the Packers bone-headed plays allowed them right back in it. So yes the Super Bowl was won by the best team, with the best quarterback in the NFL.
You can't know a thing about football if you don't understand Seattle and New England were evenly matched teams.
It was Pete Carroll's refusal to run the ball into the end zone using Marshawn Lynch that cost the Seahawks the game. If they had given Lynch the ball twice from the one-yard line, almost anyone will tell you, he would have scored.