It seems like Bigg Boss is deliberately showing everyone from Shukla to Bigg Boss to Salman, going against Rubina so that online/social media audience feel empathy for her.
After last season, anyone who discusses Bigg Boss on social media or online forums would agree that Bigg Boss is extremely biased towards certain contestants. So this time, Bigg Boss is going on a different route by not openly supporting their favorite contestant. Instead they are doing reverse psychology by openly bashing their fixed winner so that we feel sympathy and start rooting for her.
In reality, Rubina is the Bigg Boss favorite and fixed winner this season, while Tamboli is the red herring. She's an annoying bimbo who openly gets favoured by Bigg Boss and the host, and she abuses her powers to the fullest. Bigg Boss or other contestants apart from Rubina, Jasmine and Abhinav don't care much about Tamboli's tantrums, because they all run behind the person who has powers. First it was the seniors, and now it's Tamboli.
This makes them all look like spineless people who can't make a stand against powerful people, and Rubina looks like a rebel who is standing against the injustice meted out against her.