This season BB has made one blunder after another and all the interference and trying to change narratives have failed and BB 12 has become one big mess.
The concept itself of Jodis v Singles made no difference to BB bringing something new and basically it gave undue advantage to the jodis and the competition from the word go, was unfair.
Too much leeway was given and no actions taken against some HMs like sree and anup for not doing tasks at all.
Nominations have constantly been on d same theme about who doesn't deserve to be in the house, which in BB language translates to who's not fighting, doing drama and going low. BB believes only this is content and those who r entertaining in fun ways r totally overlooked.
BB's desperate attempts to create epic rivalries between the chosen ones among themselves or them against other HMs. BB tried the dipika v sree/ dipika v nehha, dipika v surbhi rivalries. But all fizzled out.
Sending sree and Anup ji to SR was another move that badly backfired.
Forcing HMs to play in a certain way and keeping on pushing them has left the HMs confused. They r so conscious that BB expects them to play in a certain way, that they r forced to go against their natural instincts and this only shows them as weak and confused.
Evicting promising HMs like kriti n Roshmi over dull ones like saurabh, urvashi n some more.
And the worse blunder was evicting Nehha unfairly. Even those who are not Nehha fans felt the eviction was unfair. Also this led to the HMs being shaken, as in knowing they need to indulge in fights etc., to show they r contributing to the show and this has lead to very inorganic and fake fights. It has made audience doubtful too as it was such an arbitrary eviction by BB.
The only somewhat successful move as been bringing Surbhi as WC. Though IMO she was basically brought to target Dipika (as she did that initially), but now her focus has shifted to Sree. But this too is becoming lame and stale.
As for the 2 new WCs, Rohit n Megha, it's too early to say.They were not so impactful, especially megha, who comes with the tag of task queen, during tasks.
I don't think there's anyway BB can salvage this sinking season. Even if Nehha returns, it'll definitely spark interest, but she wouldn't be effective to impact the season.