Latika is such an annoying and selfish daughter

She belittles her mom like anything, she gives priority to her work over everything and then puts it all on her mom. Her work is her everything and she wants to be the focus of all the business

But wht i dont get is why does pratik always blame latika, shouldnt he also take care of diya.

Yea why he always blame her first but shanaya gets away Scott free

I think it's like this:

Latika has always focused on her work a lot which doesn't give her much time to spend with Diya. So out of instinct and habit, Prateek just blames everything on her (since Diya is first and foremost the responsibility of the mother). I bet Prateek is blaming himself internally too, we just don't get to see it since he isn't an important character.