The whole Naagin team deserves credit, all teams and actors.
But then I really do not get the issue here. Cos a show has ten good actors, and each actor gets a set of his fans which contributes for the show.
Now each fan will feel that their favourite actor did the best and got trps. Also people will watch for many different reasons too, like abstract just cinematography or seeing some costumes or music. But then some want to just express that they feel, Show did great cos of their fav. They are not forcing the opinion on others, so it's completely fine.
Everyone does it frankly in some ways. Like AH fans felt she slayed in episode 2 and set the screen on fire. Same way SJ fans may feel for another episode or the same and may express it.