Actually no. Sandra (Pearl Islands), Parvati (Micronesia) Brian (Thailand), Amber (All-Stars) and Todd (China) were all considered "bad guys".
Rob WAS worked by Russell. And it goes back further than just that episode. You have to look at the whole situation to see the beauty of it. Rob honestly thought he was running the show in the Villains tribe. He "had" his alliance of Tyson, Sandra and Courtney + the votes of Coach and Jerri (who up to that point were siding with those 4). So 6 votes with a solid core of 4. Russell, Parvati, Danielle and Randy were the odd men out. They were supposed to be the first 4 gone from the Villains. Randy went. Next would've been Parvati or Russell with the remaining person of those two gone next and then Danielle. Rob and his alliance already had it all worked out.
First problem: Russell won over Coach by showing him the immunity idol and "confiding" in Coach, gaining his respect.
Next: Russell immediately figured out Rob's plan to backdoor Parvati while getting Russell to use the hidden immunity idol. Which is why he decided to give the idol to Parvati and why he told Tyson he was voting for Parvati (hoping that Tyson would vote for her too). And it worked perfectly. Tyson ended up going home. That was Rob's main ally. That killed Rob right there.. and was (to me) enjoyable to see. I love seeing people smiling, acting cocky like they got ish on lock to have everything go the exact opposite. Rob's change in demeanor when that 4th vote for Parvati showed up was priceless.
Then: Russell got Jerri to flip. You say she was a "middle vote" and that's fine. Ok. Reason being, Jerri's vote wasn't the one that sent Rob home, it was Coach's non-vote. Coach voiced his opinion that Courtney should go.. but Rob told him Russell needed to go first. And Coach
AGREED. He even made a joke about Russell leaving to Rob. So Rob thought at the very least, it would be a 4 - 4 tie vote. That's why he was shocked/pissed when it came down 4 for him, 3 for Russell and 1 for Courtney: Coach lied to him. And why did Coach lie and break his word?
Because of Russell. Because Russell gained his trust when he showed Coach that hidden immunity idol and when he used it to save Parvati and not himself.
Rob got played. And he got played directly by Russell and the actions/steps Russell took to insure that outcome. Again.. look at how confident Rob was before that. How Rob would flat out tell Russell he wasn't going to last. How Rob would tell his alliance who needed to go, etc. He honestly thought he was in charge. F'n hilarious.. especially to see him go from that to groveling to Jerri and Coach to save him.