See if Rashmi was given the stepdaughter treatment from the time her association with colors started, then by all means BB and the channel can called unfair, partial or bias
But no, since Uttaran days, Rash was favored by the channel, from a negative role to redeeming her character, reality shows, even bagging DSDT in 2017 ( channels do have a say in casting). In the entertainment industry no one is Mahatma Gandhi, its pretty common for actors who are in books of pH's or channels to get better opportunities than those who are just talented.
Rash (even during Manisha's regime) was given a fair chance over other experienced and popular faces.
With due respects any sane person can see in BB to what extend Rashmi's personal life has been dragged or made fun of ( it can be scripted or a script then went very much wrong)
Similarity the preference towards Shukla is visible to viewers irrespective whether they are active fans or passive ones.
Keeping your self respect above the show is absolutely necessary but taunting the makers with statements peeche baitne wali aurat was not received well. These days her group members have taken up what she left behind. Especially ASIM who has a gigantic fan base is causing damage. The pH's had to call Rohit Shetty to calm him
She did goof up there.