After it's shown that Aish got the highest vote, I stopped believing the show really follows public voting. Every week I usually vote for the least controversial contestant nominated, but this week I didn't bother. Why? Because BB made sure to show Aishwarya in a sympathetic way soon as she got into nominated. The repeated dialogues about what a big sacrifice cutting her hair is, the close up shots of her crying, unnecessary focus on her, etc. The pattern of contestants eliminated is usually consistent. Whoever gets less footage that week gets low public exposure. That way people who would vote for them normally wouldn't keep them in mind. The game format of BB is such that you don't vote out a contestant...you vote to keep them in. So if a causal voter doesn't get to see what a particular contestant is up to, they won't think of voting for them.
Maybe there is a gap between Kamal and the show's creators. I could see he is not happy with most of this year's contestants and how the show goes about saving them. The biggest slap in the face for him was when he saved Rythvika and said the rest is up to you, hinting she should make sure to bring Aishwarya and Yashika into nomination. That week BB didn't have any voting happen, therefore saving their favourite. I don't believe Aish brings in TRP. Most normal people I know dislike her and don't have anything significant to say about her.