Australia was beaten 22-57, a week after having lost 25-33 in the first Bledisloe Cup Test.
Halfback Tate McDermott told rugby.com.au, "We've reviewed what went wrong, and the most frustrating part was our errors, our gifts in letting them back into the game.
"It's frustrating because whoever sits in this chair says the same thing every time we play the All Blacks. We need to cut that out, or we can't expect to compete with the All Blacks."
He said Australia needed to protect and respect the ball while they also need to improve defensively.
“It was nowhere near good enough in the second Test where we conceded 57 points. To call ourselves a tier-one nation and do that is quite embarrassing.”
"That's one area we've got to lift, our scramble defence, but also our set piece defence," he said.
Their preparation on Wednesday was heavily focused on those areas, he said.
Their system broke down in the second Test in Auckland and that reflected a lack of trust between players at stages of the game.
"I wouldn't say it was one individual, it was our system. It was more guys going out of the system, more it was not trusting the person inside and outside. As cringe as it might sound, that's the basis of our defence," he said.
"We've got to make sure people are talking, and if they talking, you are listening."
McDermott said there were patches of the game where it appeared players were switching off. That wasn't down to fatigue being a factor because it was just after halftime.
"That's something we've looked at," he said.
"Whenever we have a loss, we're always looking at ourselves and where we need to improve, what went wrong.
"Dave's [coach Dave Rennie] very thoughtful with how he does it. He's a smart man, but there were sprays from all coaches. It wasn't just sprays, it was very constructive criticism as well," McDermott said.
"I thought the preview process went well, but we can't afford to show up and put in that same performance otherwise we're expecting the same result, so we've got to be better," he said.