Sure you can make the arguement that Hydra was the real villain over Bucky... but the point I'm making is that the main progatonist can be challenged both physically and idealogically. You can have a single character rolled up in one like Killmonger, or you can different characters playing different roles, but the point being a movie can and should do both. And there are different ways to accomplish both certainly... I'm just saying one element shouldn't mean you can't have the other.