bout to drop kick him

dont think so definitely have a reason..

Actually he's just really worried for her, as she is just a child and can be severely hurt (emotionally) by the king.
Also, if you don't care about spoilers here's is the reason why he despise everyone from the castle:
(There's already raw or this btw, if you check the Korean chapters you'll be able to see for yourself)
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Estrella actually died in the past from hunger, she suffered until there was nothing to eat anymore.