So, the makers earlier encouraged Paras Chhabra to continue his antics after he sided with Sidharth Shukla. He was not reprimanded at times when it was needed the most. Similarly, Surbhi Rana was encouraged last season; however, few weeks before the finale, when the game was all set, Salman bashed her left and right. Afterall, they had to boost up Dipika and Sreesanth's image before the finale.
I agree that Paras was slammed by Salman before the first finale. But his bond with Shehnaaz and Mahira was talked about and makers encouraged him. He became the punching bag this week.
It has happened with Swami Om as well in season 10.