Alastair Cook's men have now lost the opening two one-day internationals which follow their demoralising 5-0 loss in the Ashes, despite coming desperately close at the Gabba on Friday.
Chasing 301 for victory, Australia looked finished at 244-9 with six overs remaining until all-rounder James Faulkner took to the crease and smashed 69 runs from just 47 balls to deliver the improbable win.
"That was an extraordinary finish last night; we were in no position to win that game until James hit the ball through cover on the last ball," Haddin said.
Asked whether England could bounce back, Haddin said: "I hope not."
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Australia have the chance to close out the five-match series at the Sydney Cricket Ground on Sunday by going to an unbeatable 3-0, "and that's what we're looking to do", he said.
"We obviously go into every series wanting to win the series, and we're hoping after last night we can open a few more scars a bit wider and finish it off in Sydney," he said.