All the people going about, "Doesn't Corgino know that Cain is the King's right hand man, engaged to his daughter, etc." seem to be forgetting a lot of things. First, that Corgino is part of an anti-King movement, so he wouldn't care in the first place. Second, Cain being engaged to the princess only just became public knowledge within the past few weeks in-story, while the engagement has existed for at least four years at this point. To most people this is a sudden thing, caused by the King's favoritism. Because thirdly, most of Cain's accomplishments are highly classified, and the ones that are public knowledge are usually seen as highly exaggerated by anyone that hasn't seen them firsthand.
In other words, you're getting mad because of info you have as a reader, that the characters have never had.
The other issue is that most of you have never grown up in a society run by nobles. And I do mean nobles, not royalty. Most places still run by a monarchy today have either symbolic or non-existent nobility. Actual feudal society nobility can get away with whatever they want because the majority of their fellow nobles will always side with them against the king, because it's in their best interests to keep the king as weak as possible. The only exception is when you have absolute infallible evidence.
