Firstly, Johnnie was only one of around a dozen former Australian reality stars from BB, Idol, TBL, The Block, Amazing Race and Masterchef who were interviewed by TV Week about their regrets/bad experiences with the genre.
Secondly, BB was the first of those aforementioned RTV shows. Australia hadn't seen anything like that kind of reality competition show before - with the exception of Popstars - so when Johnnie was on the inaugural BBAU, he, nor any of his fellow HM's, would have had any concept of 'portrayal', or 'editing for good TV' at the time.
Considering the guy's greatest crime was hugging people he'd nominated after Nominations, his 'Johnnie Rotten' tag was completely undeserved. Personally, I loved him on the show, particularly the bro'mance with Blair. He was also a really positive role model for the gay community. I don't blame him for having felt shocked and upset by the public reaction he faced after the show.