Those serials which do well even after that are because their PH, CVs and writers remain focused and keep a close check on what audience is expecting and keep giving new interesting stuff to audience and good treatment...you cannot take audience for granted on TV (switching channel is a matter of click of a button). Its very easy to loose your audience but very difficult to get them back. Also serials running have a loyal audience who are watching for some reason which is appealing to them...You cannot think people will watch junk in this environment.
You need to respect your audience and then only expect loyalty.
Since this is NK forum, I would like to give example of NK to the PH and channel -
If feel the initial storyline with adult Avni and Neil was over once Avni's real identity was out and she got accepted after Neil's insistence...that's were the story was done as per initial concept and story.
After that they just came up with new tracks one after the other just to stretch the show...Juhi's return, RangMahal, Misthi being there, Vidyut added, Jail Track, Neela Maa death/Twist, 10Yr leap, Sayesha's love story and AvNeil's readymade child and now final closure are just added tracks.
Recycling the same set multiple times and even using same furniture's in different places (that green strip sofa is in Avni's room in new orphanage in Mumbai where Neil used to sleep once they got married). In the name of outdoor location, we all know what we have got.
Clothes for even the Female lead and Male lead are recycled. Mix and Match of Blouse to different sarees...In towards world that how you dress your Female Lead on Star Plus Prime Time (9pm) show...Like Seriously...You actually ask her to gain weight just to justify there is 10yrs leap and she has a child...In 2018, Do you not see Kareena Kapoor who is a mother or for that Matter lets take TV example, Divyanka who is playing mother to married kids and Jennifer who is playing recently become widow in Bepanaah...that's why they at TV Divas...Luckily Aditi Rathore is very Beautiful and still manages to look so pretty with all these atrocious dress combination and no makeup, no nail paint and weight gain.
I can keep on going but lets just leave it for now...You need to learn from your mistake and not always blame audience for not watching your show on TV.
Youth audience (in India and International) who love romantic show, AvNeil and AdiZa are watching and they are contributing to whatever TRP you are getting both on TV and online...
TV watching audience are not the ones who majorly live in Delhi and Mumbai...they are ones who live in second or third level of cities where daily dose of entertainment is TV which is the easy and cheap medium. Metropolitan people like to watch movies and web series or on Internet from whatever time is left after work, college and Traffic.
So its important to Know and Understand your Target Audience.