You know...they have to play the entire game, right?
They were good in the first half. Yay. Let's get them a participation trophy. "Best First Half Super Bowl Defense 2016".
Their defense was an embarrassment the entire second half. An embarrassment. You play two halves (and in this case overtime) and get judged on the overall body of work.
Again, under no circumstances does any defense deserve the adjective "average" let alone "good", when these are the final 5 Patriots drives. 5 drives. In a row. At the end of the game when it matters the most. Look at it again:
13 Plays, 75 yds, TD
12 Plays, 72 yds, FG
5 plays, 25 yds, TD
10 plays, 91 yds, TD
8 Plays, 75 yds, TD
That's 48 plays, 338 yards. 4 touchdowns, a field goal, and two 2-point conversions in roughly a quarter-and-a-half. This is nearly the total Atlanta put up in offense for the entire game.
If you consider that "good", you must have loved the Patriots 2010 defense.