"I'm happy leading these boys at the moment," Smith said. "Unfortunately I haven't done as well with the bat in this series as I would have liked.
"Both me and Dave [Warner] as the senior players haven't stepped up.
"That really hurts your team when your two senior players aren't scoring the runs that they need to be.
"But look, I'd like to keep taking this team forward and leading the boys and doing the best I can."
Smith and his men have just 16 months to address their issues before their World Cup title defence begins in England next year.
Australia's 12-run loss to England in the fifth and final ODI on Sunday summed up their problems.
Set 260 for victory at Perth's new $1.5 billion stadium, Australia were cruising at 189 for four before suffering another middle-order collapse.
The one bright note for Australia was the form of Marcus Stoinis, who struck 87 off 99 balls after being promoted to No3. His departure sparked Australia's collapse.
Smith said it was another example of a missed opportunity.
"Those are the things that has really hurt us," Smith said.
Warner will captain Australia's T20 squad in Smith's absence, starting with Saturday's clash against New Zealand in Sydney.
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- AAP