If you ignore the fantasy setting, this is a genuinely good episode about relationship drama. Finn makes understandable but selfish and harmful choices, and FP has the appropriate reaction. It's not a contrived conflict based on a misunderstanding; she is angry at him for a good reason.
This alone is rare enough in fiction, especially children friendly fiction. But what makes it really special is that it ultimately doesn't work out between them. This episode was the beginning of the end for the two. It shows that not all relationships will work, and that's not something any other show will teach you.
My only critique is the inclusion of the cosmic owl, since that gives Finn a more legitimate reason for his actions, which lessens the gravity of the episode and also seems entirely unnecessary. You could have easily done the same episode without that.
This alone is rare enough in fiction, especially children friendly fiction. But what makes it really special is that it ultimately doesn't work out between them. This episode was the beginning of the end for the two. It shows that not all relationships will work, and that's not something any other show will teach you.
My only critique is the inclusion of the cosmic owl, since that gives Finn a more legitimate reason for his actions, which lessens the gravity of the episode and also seems entirely unnecessary. You could have easily done the same episode without that.