I get why some of you are upset by this arrangement but what did you really expect when you are a royal and actually have caring worrisome parents? This was always gonna happen. At least he likes her a bit as a friend. That’s more than most royal marriages in fiction and real life.
Personally im just curious where else will the story go
Who are you to tell him how he should live his life? Even if he somehow got over his trauma, it is his choice how he lives his life. If he wants to get revenge for his family, then go for it. If he wants to live a simple life, then go for it.
Do not push your own regrets and agenda on this poor traumatized boy. Work out those things on your own time not on his. He has gone through enough and you clearly know that. Instead of being a jerk, actually help see how life can be and how he can use those skills to help him manage his goals whatever they may be.
Honestly I hate this guy. This is no backstory or anything that can make forgive, like or tolerate this man