I actually found this story very satisfying, it's similar of what I fantasize for other stories. I often find these princes are let off to lenient for their horrible treatment of the protagonist. They deserve a little moment of desperation for the years of torment they caused. It's always like "You tormented me with scorn, contempt and unnecessary coldness, used me in schemes or played with my emotions causing mental scars and traumas, but you did that cause you actually liked me // you like me now? Oh well, I am so happy, everything forgiven and forgotten.~" There is never any atonement or guilty conscience. Sometimes they even think nothing of it, like it's their way to go to mold them or 'have them come out of their shell'/have them realize their 'love' for him. (That especially ired me with with the other stories 1.1 , 1.3 and 2.1)
Though the explosion death scene was a bit rash and over the top it actually feels like they're even now and can start over as equals.