Unsuccessful Star Kids

Being a star kid had an immense vaue in the bollywood. It was like a license to enter the "Tinsel Town" without any struggle. The same thing is true to some extent till today.
Having said that, being a star kid can certainly help you with the "extra push" while entering, but it is not a guarantee of your success. 
Want to contend? Here are few examples:

Jacky Bhagnani
The actor was not received well with his first movie rolling down the aisles of box office. He tried though and his second movie did quite well on box office window. Even critics were a little sanguine about his imminent success in the industry. But then there was a lull. A void. No movies, no parties, no news. So it seems that it will still take some time before fortune smiles at him. As of now he is standing on the verge of oblivion.

Tanisha
"Acting runs in her blood" would not be an exaggeration, at least speaking biologically. Her grandmother, mother aunt and sister all have been strong pillars of the industry. But despite of all this, Tanisha failed on the box office. Her first movie with Udai Chopra projected her as a "loud showpiece" that rather turned off the audience instead of attracting them. She did everything in the movie, except acting. So reluctant was she that after earning her "Petty Cash" for the first movie she seems to have scampered away right on the last day on the sets, never to return back.

Zayed Khan
Zayed was another person from whom there was certain expectations especially looking at his work in movies like "Mai hoo na" and "Dus". Agreed he could not act, but he had certain X factor. Besides his looks too are good. He reportedly attended some acting schools in London too but still seems to be perfecting his skills before coming again in limelight. Another Mr. "Perfect Khan"?

Luv Sinha
Please do not tell that you don't know him, at least as an actor? Yes, that is true. He did a movie once upon a time. But the movie was so unimpressive that it did not collect the ROI, talk less of profits. The timid actor became more timid before finally slipping into an unknown world far from bollywood. 

Sikandar Kher

He is another star lad whose entry in the bollywood was not highly celebrated. Son of veteran actors anupam kher and kiron kher, Sikandar was not even moved a bit by his failure and did a few "light struggles" with some not so big banners before saying bye bye to the industry. Though he does sometimes try to satisfy hos "creative pangs(?)" that is not too often.