First prince being treated unfairly there.
He did nothing wrong nor said anything outrageous and was still met with the saintess anger and the Godess throwing him away.
It still annoy me a little how these stories have sudden bits of misandry like that...and people still act like it was a good thing.
I think you're looking too deeply into this. She was in a bad situation, being hounded by the people from the slums, all her prior interaction with princes were... Less than stellar, let's put it that way, and here comes someone at that bad moment, proclaims himself a prince. Her first reaction would obviously be negative, so to some extent, first prince was just the victim of unfortunate timing, if anything. Plus the Goddess didn't harm him, she put him to sleep in a bed of leaves so comfy he instantly fell asleep, so we can probably assume that wherever he ends up landing, he won't be hurt. Also, fair to assume goddess could sense he didn't have entirely pure intentions in coming to meet Alm so...