Adultery அவள் இதயத்தின் மொழி

[Shajith]

These days all women not happy with sex with husband are going for divorce. No woman doing like Pavithra. If every woman starts doing like this and husband doesn't care, most of divorce cases will be reduced. Ha ha.

Friend, I honestly don't understand how this can be called a criticism of the story. 
You are saying that these days, women who are unhappy with their sexual relationship with their husbands go for divorce, and that if every woman behaved like Pavithra and the husband simply didn't care, most divorce cases would be reduced.
Is this actually your criticism of the story, or are you creating your own hypothetical solution based on Pavithra's character? 
You can absolutely criticize the character. If you don't like Pavithra's behaviour, say so. If you feel the author's portrayal of the husband-wife relationship is wrong, say so. If you don't like the direction of the story, explain why. That's all perfectly valid.
But saying “if every woman behaved like Pavithra, divorce cases would be reduced” goes beyond criticizing the story and turns it into your own social theory.
And then ending it with “Ha ha” makes it even harder to understand whether this is serious criticism or simply a joke about Pavithra's character. 
Criticizing what happens inside the story is one thing; taking the story outside its fictional context and creating your own conclusions is another.
So please criticize the character, the writing, the plot or the author's approach — nobody is stopping you.
But if we start using a fictional story as a basis for real-life social solutions, then I'm not sure whether we are discussing the author's story anymore or writing a completely new theory in the comment section. 
Story is one thing, personal imagination is another, and genuine criticism is something else. Let's keep those three separate.