@Sayorii-chii it's not hate per se. They probably just feel mild annoyance. I'm guessing the structure of the story thus far is too condensed(in their opinion, not mine) for them to imagine there's more interaction shown offscreen, so perhaps they are imagining the prince as having a fixation on her greater than "let's get along since you're good at magic" as he claims.
Which I personally think isn't true. I do agree with you that as a CHILD, he is allowed to be naive and thus fixating on someone clumsily is exactly what a kid would do. One could argue that being raised as nobility might prevent this, yet by that logic villainesses would never come to be. Plus, raising a perfect child is rare both in and out of fiction. ESPECIALLY royalty.
@Kabeidon_ come on man, why cuss at someone over a cute story like this? Take that violent language back to SFV or whatever you were playing before you read this. lol