As long as the Prince apologizes, I’ll forgive him.
Blowing up at her was 100% an asshole move, I get hes stressed and as a noble, he’d have to set down a lot of his pride in order to bow his head to someone of a lower class.
Assuming she was a scammer is 100% not a logical conclusion, if she wanted to scam, she wouldn’t have rejected the gifts and revealed her hand was better til long after getting the compensation.
He wasn’t in his right mind when he yelled at her, so although it’s a dick move, it doesn’t mean he’s a dick entirely. The slap was deserved, and it’s great the engagement is going downhill cuz neither of them like each other so it’d have gotten sour sooner or later.
I’m expecting him to apologize in a few chapters (or even next chapter) cuz I don’t think the Prince is a bad guy, that’s not the author’s intent. Imo, the author’s intent it to demonstrate how the Prince can’t think well under pressure, whether it’s in a dangerous position (like with the monster) or when he’s put on the spot and caught off guard (him willing to bow down only for the maid to casually dismiss the need for compensation), he holds grudges and has an inferiority complex it seems + given how he’s the Prince, it’s only natural for him to be on edge all the time and paranoid, so while the accusations of MC being a scammer are unfounded, his feelings come from a past where either he’s taught to be paranoid or he was betrayed when he was younger.
Like someone else said (I think some one else said?) how he handles the situation from now on is what matters, if he’s able to cool off and apologize, see his faults for being hasty, then at least we know that he doesn’t let his pride get to his head once he’s not irritated.