Karan had clearly told him that he trusts 2 people him and Teja, Nishant said he trusted Pratik n then Karan but when given chance for contendership he did not even take Karan's name so what sort of fake friendship is that. Karan did help him along with junglevaasis to be a captain when ppl wanted to support Jay as well.
Nishant blames that Karan plays game with him but it's the opposite, Karan clearly never did any wrong to him in the show behind his back, always told him what he felt but he is the one who kept bitching and playing double games.
Nishant's statements like Karan doesn't want us to shine and so many more just shows his insecurity n fake friendship.