The busy minds at How It Should Have Ended found some of the plot holes in Black Panther and applied real-world logic to them. That kind of thing can make a superhero movie dangerously short. It's a good thing they threw in some other superheroes to make things interesting: Captain America (at least I think that's him -he wears a star) and a couple others you wouldn't expect in a Marvel movie. -via Tastefully Offensive
I mean, it just doesn't make an inch of sense that anyone could challenge the king to a fist fight during coronation and if they win they would become the rightful ruler of the land...
Wakanda would more likely be a dictatorship with many aspiring tyrants (like, let's say Marvel's very own Latveria) than an idillic paradise Utopia.