I felt bad for him. Nissar seems to not be from a very well-off background like Abeer and Sasha. And seems like he was an underconfident guy who just tagged along with his friends. The scene where Abeer and Sasha give him a hard time for trying to befriend Meher... it might have been some friendly teasing but I think these small things might have furthered his low confidence and made him stay under his friends' (especially Abeer's) shadows.
And now, even in his career, Nissar seems to have remained contended to stay in Abeer's shadow. He isn't able to stand up on his own talents and capabilities when given the chance. I think Meher coming in to this channel was a good thing for him... atleast now his full potential can be tapped.
About the precap... Abeer agrees to help Nissar and says this would be him returning Meher's favour. But I would like Abeer to, at some point, want to help Nissar not for returning a favour to Meher but because he wants to help his very good friend to shine.