Three years ago, Scott Morrison's ebullient personality as the little known and newly installed leader of Australia's Liberal Party was a big factor in its unexpected election victory.

Now Prime Minister, Morrison's personality is a liability, with public attacks from members of his own party and polls showing his government on track to lose to the Labor Party in a general election next week.

Confronting his unpopularity on Friday, he acknowledged being a "bulldozer" but said he would change after the May 21 vote.