Um, nominating two winners as the most universally hated housemates doesn't make a lot of sense.
I'd say Josh (2012) was overwhelmingly liked.
So Tony Abbott won the election and he's a prick that most people hate.
Yeah but there was a very strong dislike from Ben among a lot of people. His popularity came from people who enjoyed his silly side. Which unfortunately this version of BB is more on the superficial side of a social experiment. Those that watched the show with an eye to this, not the light entertainment way, were predominately disgusted by his behaviors and who he was as a person. But he did silly faces, tilted his head and that's all people saw and voted for. Instead of him being the orchestrator of the social divide and bullying in the house, who was a compulsive liar and manipulator.
Terri winning was rigged by BB. BB that year wanted an older person, and they did everything they damn well could to keep her in the house. She got evicted. They brought her back. She had a task to become a housemate or leave. She failed that. They let her stay. At every opportunity they talked about how great she was. Remember back then there were BB shows where people discussed openly. There was constant stuff from Mike G and others about how wonderful she is and that she should win. The edit was extremely in her favor. Remember this was an ignorant, racist woman who loved Pauline Hanson. How much of that did we see? Despite the fact she talked about it in the house as we heard from evicted housemates.
To many people her winning and the way BB treated her was the death of the show. Hence she is hated.
Oh and I didn't even explain the most shocking part of her winning. In that eviction, Kyle and Jackie were constantly telling people to vote for her. Mid show they changed the rules to show us the graph with the faces. Ben was winning. The were all, 'if you want terri to win, vote for her now, we won't show the graph again.' Low and behold they ended up extending the voting period, continued telling people to vote for her. Showed the graph again with Ben still winning. Then what do you know, they decided to close the lines once she had more votes. Completely rigged.
So yeah I would say she's pretty disliked among people, both for who she was with a large factor to the way she got special treatment.