Big Brother finalist Ben McCallum says he and his fellow housemates are to blame for the reality TV show's demise after eight years.
The 19-year-old law student from Perth, who became one of the final three, says he feels guilty because the housemates were not entertaining enough.
"I see it as a negative reflection on the housemates that fuelled the house and the content on the whole," McCallum told AAP.
"I think it kind of sucks, and I sort of feel guilty that the show is over."
Trying to rejuvenate the program, producers opted for a diverse range of housemates this year, including the oldest contestant yet, a midget, and a UFO-believer.
But amid poor ratings and criticism of new hosts Kyle and Jackie O, producers announced last week that the long-running reality TV show would not be returning.
McCallum said he thought that this year's housemates wouldn't have great opportunities, because the show wasn't very popular.
"I think we're going to go back to being the same people ... doing the same crap as before the show," McCallum said.
Big Brother winner Terri Munro, 52, and runner up Rory Ammon, 22, said they were devastated after finding out, following 85 days in the house.
Grandmother and Pauline Hanson supporter Munro said she was in shock at becoming the last winner of the series.
A retail worker from NSW, Munro picked up $250,000 cash for winning, but said she had not expected to make it past two weeks.
"My family said two, three evictions you'll be out. My workmates said the same thing. It was a big laugh," Munro told AAP.
"I thought exactly the same thing.
"I'm quite humbled by it all, actually."
An exhausted Munro spent Monday night dancing with other contestants at Gold Coast nightclubs until 4am (AEST), she said.
Ammon, a bricklayer from Geelong, admitted he was upset that he had just missed out on the cash.
"I'd be lying if I didn't say I was disappointed," Ammon told AAP.
Ammon and McCallum also talked about their relationships with girls in the house, Rhiannon and Bianca.
Both said they did not know if anything serious would happen with either of the girls and distance was a problem.
The winner's announcement was watched by more than 1.4 million people across the country.
That was about 500,000 less than tuned in last year.