Yes JR many were upset with Payal and Palak but I think it is natural for the girls to feel that way... and they were also poisoned by that buva... and in the school also they heard many tale regarding step mom..
While boys do not pay attention to those kind of details..
I particularly did not feel bad as it is a temporary situation till they see and feel comfortable with Aarti and accept her that she is not mean or bad...
For Ansh it was different as it was a downright rude behavior with elders and not Yash... As he have not seen his dad and having a dad is a fascination thing for her and he loves the concept and he adores and heroworships his dad..
So there is actually no comparision with the attitude of Ansh and attitude of girls..