SPOILER!!!!!!
I don't think he has a 'goal' anymore tbh. If you've been spoiled before, then you would would know that his case is a little different to Moondae's. We already know he doesn't have the little pop-up window like Moondae telling him what to do, and he most likely started out with the goal of being the 'best' idol/idol group. (Not sure yet) Unlike Moondae, he has the ability to start over from a certain point when he dies, and it seems that at some point, or over time, he's become so obsessed with becoming 'perfect' or having the perfect career, that he'll 'start over' on purpose when it isn't. Also, at this point he seems to believe that Moondae's situation is EXACTLY like his, hence why he says what he does to Moondae.
can someone spoil what tf is that sunbae's goal? why is he so determined to kill off moondae its starting to pmo