Yeah there is a lot of gaps to fill within Chuck's story and will hopefully be fleshed out in the episodes to follow. But taking into account how little we know about how things were for them back then and also taking his story at face value (unreasonable I know). It's pretty clear where the contempt for his brother…

And conversely Chuck is the manipulative monster that Jimmy created after the incident with their dad, assuming that Chuck's story is accurate.

I think the backstory with Jimmy stealing the 14,000 and his dad subsequently dying negates him from being a full antagonist, which happened to clear up Chuck's motivations quite a bit. And that largely depends on whether he is telling the truth, which I wouldn't be surprised if he is. Kim will eventually confront…

I mean where Kenan is caught off guard because Kevin Roberts can't possibly exist, so he shoots him. Will Smith is equally miffed about the quantum physics girl, and does the same while shrugging off the alien cardboard cutout. Similar premise, still funny but not entirely original and Kevin Roberts is most definitely…