Nishant has been given several chances to up his game, right from 1st week when Salman himself said so, then even that the caller said so, pretty directly.
Despite all that, he wasn't able to come across as a strong individual, at first he remained a sidekick of Nikki's group, then became a sidekick of Rubina's group with NO strong stand of his own.
Then he made several mistakes one after another -horrible performance as a captain, constant fake preaching about ''sahi galat, auraat ki izzat'' to look good for the cameras, too diplomatic, never had any strong stand/opinion regarding any issue (like he could've shined by standing up for Rahul during his fights with Pavitra or Jasmine), gave up in the captaincy task by letting go of his bag too easily, which if he didn't then he along with Abhinav could've fought hard till the end & avoid Eijaz of being the captain.
Despite several chances, he FAILED to come across as a strong individual. So his eviction, although unfair, but it was justified based on his poor overall performance on the show. 😒
But good luck for his future, may he have a great career ahead! 👍🏼