Dowling praised the Channel 5 show's producers for increasing the drama inside the house, but admitted that he couldn't have personally coped living with this year's housemates.
The series two and Ultimate Big Brother winner told the Daily Star: "I do believe this has been the bitchiest, nastiest and most backstabbing house we've ever had. They absolutely hate one another.
"I seriously think if I had been a housemate this year I would have walked. I couldn't have lasted."
Dowling said that he was shocked at the lack of remorse from this year's evicted housemates. "They just go: 'Hey, that's me. I'm young and I'm a bitch'.
"But fair play to the producers. This lot did deliver the drama."
TV watchdog Ofcom has had over 1,000 complaints about the series, which have included allegations of racism and aggressive bullying.
Deana Uppal, Adam Kelly, Luke Anderson, Luke Scrase and Sara McLean are the five housemates hoping to win the £50,000 in this evening's final, which airs at 9pm on Channel 5.
Celebrity Big Brother - Rumoured housemates
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