I think Rubina's game was over two weeks back when Salman and the COTW exposed her sneaky move of making people pawns in her personal battles. Since that week, Rubina's game has taken a back seat. The public perception of Rubina has been more negative than it was before she participated in BB. A lot of people have called out Rubina for her selective stands, hypocrisy, and her passive-aggressive ways to put people down but her lack of sincerity to participate and put in a fight during the tasks indicates her complacency, a big negative in a competition. It would be absolutely unfair if such a contestant wins the season and while I think her chances are going down with each week passing by, she might still manage to scrape through (not because her journey was spectacular or memorable but because of her previous TV work).
For Rubina's sake, I hope she quits because such a win would not hold any value and she could also save herself from making any more damaging mistakes.