>>281714550
Your conclusion isn't wrong, but only correcting these two points
>king doesn't give much of a fuck that his heir is a pile of shit and that he's gunna suicide by incel rage
He's the second prince, he was never in the run for the throne anyway, and the first prince and first princess are already way more talented and capable than he is, so the king didn't really bother with his education and only noticed he was scum when it was too late.
>ice loli's sister is weaker than her and seemingly about to mindbreak betray the nation because she notices she's somehow lower on the totem pole of 'might get to fuck allen'
Not sure where you got this idea, she isn't betrying anything she's just having a mental breakdown because the only thing her mother truly left for her is to be the heir of the northern dukedom, but she can't take it because she's weak and has no talent