The ex-Sydney Swans coach said it was a difficult task to try and instil belief into the playing group.
Melbourne coach Paul Roos said his side’s last quarter collapse against Brisbane on Sunday was a result of players being scarred from years of losing.
The Demons led by 14-points heading into the final term, but went on the lose the match by 23-points.
“There’s clearly some who might not be able to get over what’s happened here in the past,” Roos said.
“You’ve got to go back to the mindset and we’re waiting to get beaten.”
Roos said some of the mistakes his players made were “extraordinary”.
“Today was as frustrating a game of footy as I’ve ever seen,” Roos said.
“I haven’t seen anything like that before in my time.
“The mistakes were extraordinary. Extraordinary.”
The ex-Sydney Swans coach added that it was a difficult task to try and instil belief into a playing group so used to losing.
“There’s a willingness to improve and there’s a willingness to comply,” Roos said.
“But I think that lack of belief that we can win, or we’re capable of winning, is far, far greater than what I’d imagined it could possibly be.”