As the Broncos tumbled out of the finals at Bankwest Stadium on Sunday afternoon, so did a host of unwanted records for the six-time premiers.

The result was not only the biggest loss in finals history - eclipsing Newtown's 55-7 defeat of St George in 1944 - it was also the proud club's worst ever defeat, shading their 56-0 losst to Canberra in 2009.

The club's premiership drought is now in its 13th year, the longest in their 31-year history.

Asked about his post-game message to his players, Broncos coach Anthony Seibold said: "See ya Wednesday morning," in what was a reference to their upcoming player reviews.

Seibold refused to mince his words, promising to take the blame for the loss.

"I'm just really disappointed, embarrassed," Seibold said.

"I can't toss up any excuses, I'll wear it. I'm the coach of the club so I'll take responsibility.

"It's also my job to fix that. I'll have a good look at things because in big games, that's where the Broncos are at at the moment."

After taking over from Wayne Bennett less than 12 months ago, Seibold conceded his side were "a million miles away" from where he expected them to be.

"We want to win, we're not here to make up the numbers and come eighth every year," Seibold said.

"There's a lot of good young men in there who are winners.

"You want good people who work hard who want to win. It's my responsibility to fix that.

"It's going to be a long pre-season, a long off-season.

"I'm embarrassed, surely the players are embarrassed. They'll have to take some responsibility for what they dished up today."

The Broncos have been highly criticised for their lack of a genuine halves combination after hooker-cum-halfback Jake Turpin and fullback-turned-five-eighth Darius Boyd were asked to steer the side around in the back third of the season.

Sean O'Sullivan (knee) and Tom Dearden (ankle) weren't available for the finals because of injury.

Seibold didn't rule out going to the open market to fill holes in their roster, saying they would look at every aspect of their set up and playing group.

"Everything is on the table, I need to fix this," Seibold said.

"In a big game under pressure we folded."

Australian Associated Press