The point which most are forgetting is Atharv does nt knw Vividha has gone alone to Kashmir to face the terrorists , does he? He only know she left him in search of Ravish. He might be thinking she is taking police help or something. Expecting Atharv to react when he doesn't even know Vivi is in danger is foolishness.
Why is the expectation so high for Atharv? He's just underwent brain surgery, has been hit brutally multiple times on head, he is still dealing with the loss of time, the change in relations. He is now dealing with heart break and that too because of a family and brother he hates since childhood. I'm surprised he is even standing on his two legs post all these 😆