For me, season 13 was very biased towards Sidharth Shukla, and very against Asim. Sidharth got away with everything, and Asim got bashed for everything. The bias was very clear when they put Sidharth and Paras in secret room to hear all conversations. I think Sidharth had a relative, or an ex-gf, in the makers team. I think from season 13 bias started. Asim, and anyone with him, was bashed. In season 14, I think it was Rubina, who was bashed every weekend for the smallest things (I still remember the issue of her showing her 4th finger was made so big by SK). Then of course Umar Riaz, and even Vishal Kotian in season 15. 16 I didn't watch. 17 was very biased against UK07, Vicky, Khanzaadi, and full support to Manara in everything.