Fully agree with you - the writing has failed drastically and the producer seems in no rush to redeem it!
Siku said he was trying to show Pallavi see-sawing between her kartavya/farz and her pyaar, but in what world does a happily married woman have any kartavya/farz to aid her ex-husband who left her to rot as a widow and serve his family for all intents and purposes?!
Then showing Mandy as an outright creep did further damage to their cause. Why is he so obsessive? What's his deal? His plotting and execution is too speedy and doesn't match the pace of his character reveal. Had they shown the reason behind his obsession or given more insight to his relationship with Dr. Ramya and his chota version of Farhad (wohi... sidekick dost uska, naam yaad nai mujhe), then I'd still come to appreciate his character. Instead he's being chummy with Sunny and Keerti for no rhyme or reason other than the fact that they want to separate RaghVi. Arrey bhai... koi sar peir toh ho ya bas bewakoofi pe bewakoofi dikhani hai?!
Raghav as a lovesick fool is tolerable only because it speaks to the intensity of his character and the depth of his emotions. Otherwise, him aimlessly chasing after Pallavi is not a good look on him at all!
Gaah... I could write an essay on this topic, iss hadh tak mood off hai mera! Sikuu's been on my nerves since the day he said he's making changes for the fans... uhm, excuse me, why are your very own brain cells on vacation that you need to rely on us to tell your story?! Use our feedback to improve your writing, don't keep flipping the script as if it's a bloody light switch!