This is TV show most of the times one person out of triangle always get hatred. It's very common on India forums.
Just want to put my two cents when it comes to Malini s character.
Someone who has been in relationship for 7-8 years and then finally United with love of life. Then all of sudden everything changes. It's not like after many years love fade away or fights leading to differences between them. It's just u feel completely disconnected.
Malini being woman expresses herself and their family also is really understanding who looks at face and understands ( TV shows family lol ) while ADI being the man not expressive ( his situation is such that he can't even express) and he yells and snaps back at her.
Now Malini goes to different kinds of emotions and reacts and expresses accordingly. Sometimes she feels heartbroken she speaks if her love is true it has to come it will return ... Then her discussion with Nishant where she expresses her fear of losing him . Sometimes she gets angry that yesterday he yelled at her when she tried to speak .
She is going through many emotions just like ADI and she is in pain just like ADI
Deep down Malini fears losing him . She doesn't understand what went wrong .
In future she might turn into just like her mother but we can't blame her for that.
Right now there is absolutely no fault of malini s character.