For my story, I find that when readers give me their opinion, they become too fixated or distracted by the minor characters sometimes, when the minor characters' behavior and actions are not as important or not as strong on the themes, of what the story is really about. For example, in my plot the villains are arrested and go to court, but they get off for lack of evidence, and the MC has to try again, and find another way to get them. But the readers keep on asking themselves, well why would the prosecutor take the case to court if surely didn't have enough evidence in the first place? He wouldn't do that, they felt... Things like that. But the prosecutor's behavior or actions is not that important to think so much about or explore. The only characters who's complexities are worth exploring are the major ones. Those are the character arcs that are part of the story's theme, and not some minor character, who is only there to support part of the plot, and that's all. So when it comes to writing, is there any approaches I can take to not have the reader so fixated on minor characters' complexities, when that's not what the story is about?