Fine, you guys think that Armaan mistreats her and that she is a doormat... I agree!
I know, Armaan has an anger problem and when he gets angry he cant think straight... so yes he sometimes get angry unnecessarily... BUT Tanisha knows he has this problem... she doesnt say he is right... she never justifies his anger... she says that she knows his anger so she lets him scream instead of screaming back and making a scene...
On the ither hand, Gauhar justifies Kushal all the time... she thinks he is right at mistreating her in these last few weeks... she blames "external entities" and not Kushal... she sympathises with him that he has these child like qualitites...
In stockholm syndrom, the hostages express empathy and sympathy and have positive feelings toward their captors, sometimes to the point of defending them... And this is exactly what Gauhar does