Interesting point. Yeah if they've had no countermeasures in place after two girls has to be sacrificed to save the country, they should just sudoku themselves.
I mean, we saw that they had figured out Faris’ plan 10 years ago, realized that they had no moves open to them except to sacrifice Scarlet, which would mess up the plan.
Then what happened?
The Crown Prince is still incompetent, and is still engaged to the Faris agent that is actively working to bring about their nation’s annexation; except instead of being a member of minor nobility she now wields the office of Crown Princess and all of the power and access that it gives her.
The preparations by their neighbors to carve them up have proceeded; we haven’t seen any indication that the connections between Faris and other nations that are in on the plot have been disrupted or slowed down.
And we have not seen the Republic, which Scarlet’s mother comes from, aid the kingdom. Why should they, anyway? They gifted away one of their daughters, only to see her die, and to add insult to injury, her daughter gets publicly executed and her name dragged through the mud. So, unless I’ve missed the mark, relations with that nation are likely pretty cold right now.
And instead of being able to clamp down on the internal corruption which was being used by Faris, it only got worse.
Maybe I’m missing something, or it will be revealed that the King and the Duke have been setting up effective countermeasures all this time. But for now, it seems like these young ladies have sacrificed their lives to buy time to save their nation, time that these men have squandered whining how miserable they are for having had to make the hard choices that is their JOB and DUTY, when they should have been initiating bloody purges and shadowy assassinations to make those sacrifices count for something.