I'm really tempted to defer to your expertise on giving up, considering "quitter" is your middle name. But then, your abiding lack of football knowledge holds sway.
Of course you failed to consider this defense: (1) got no offensive support (156 total yards, eight punts, three turnovers, 0 points); (2) was on the field a whopping 39:34; (3) STILL limited New Orleans to 304 total yards; (4) STILL held the Saints to 30-percent third-down conversions.
No, they did not quit. But they had ample excuses to quit, considering how things unfolded and first game without Judon and Gonzalez, arguably their two best players.