I don't think that is the case. What it seems to me is that she is carrying lot of baggage from the past which has made her insecure of their relationship and that is a reason why she constantly seeks validation for their relationship and expects Ankit to give her clarity about his feelings. The relationship looks like is getting toxic but for both of them, not one person alone, as even for Priyanka she needs a closure and does not want to stay in limbo. Her fault definitely is there too, as she for sure seems to have som narcissistic tendencies, but then again I also feel her flaws always overshadow Ankit's flaws, leading him to gain sympathy.
He is not making any firm decisions and giving Priyanka mixed signals, confusing her on whether to stay or move on. One moment it seems like he only considers her a friend and nothing more, and next moment he is constantly following her throughout the house, giving hints that there is a spark, etc. And all this is making Priyanka concious as she wants to guard herself and keep the walls so that she does not hurt later when he goes back to saying there is nothing.
I also do not feel Priyanka is as bad a person as the makers are trying to make her seem, because in past 2 weeks or so, they have been constantly showing her bad aspects, they show Priyankit fights but not the late night conversations which can be seen in LF where they maturely talk out things, constantly confusing her through contradicting feedbacks over the weekend, sometimes asking her not to involve in unnecessary muddas, and sometimes asking why she is not taking her friends' side and getting involved in their muddas. It seems like the makers want to set the toxic gf narrative for Priyanka. And honestly it's not just happening with Priyanka alone, but also happening with Abdu and Shiv in at least last 1 week. And all 3 are the ones with biggest fandoms.
I don't know whom are the makers supporting but there definitely is a boss for sure, but the makers' favs are not the ones who have the biggest fandoms.
Maybe I am guessing a lot of the others have MGs because of which Bigg Boss is bound to keep them, but the people who are actually doing well are other people whom BB was not expecting and now BB is not sure whom to evict, and since they are not able to evict people, they are delaying the Wildcards too.