Because this show has nothing new to offer. Casting was all wrong and I don't know why Farhan Khan has not been replaced yet. Majority of viewers are still not impressed with his acting. He's had plenty of time to prove himself, in fact, too much time! I understand that this is not a romantic based show but that doesn't mean we should accept a horrible actor. He has zero screen presence.
Also, with the exception of Deeya Chopra, these other friends are horrible. Actually, when I saw the first episode of this show, I thought that they were acting like teenage girls. It actually seemed a bit inspired from pretty little liars. After that, I couldn't take anymore of it.
Honestly, change this whole show up now. It's a disaster!