“We have had a very narrow focus on the Cowboys.
“There is no excuse for that [display against Melbourne]. It certainly wasn’t good enough … but I am sick of talking about it – I want to see some actions.”
Brisbane have not been helped by veteran back-rower Matt Gillett remaining sidelined with a back injury.
Not sighted since round 15, Gillett had hoped to return against the Cowboys but was overlooked again after experiencing lower back spasms.
Seibold could not give a date for Queensland forward Gillett’s comeback match.
“As far as Gillo is concerned, it is a week by week thing,” he said.
“We sort of thought he would be back next week but he wasn’t. Then this week, we thought [he’d be back] but it has taken a little longer than what the medical staff had hoped.
“Obviously, it is frustrating for Gillo. It’s disappointing for us as a team because we do miss his experience.
“But in situations like this, the welfare of the player comes first.”
Seibold admitted it had been a turbulent first year as Broncos coach.
But Seibold was confident he was on the right track with utility Jake Turpin becoming the latest to commit his future, re-signing on Tuesday for another three seasons.
“There was a lot of competition for Turps. There were a number of clubs who made him significant offers,” he said.
“But he stayed here because he can see where we are going and the things we are putting in place.”