It's bad.
Boy uses magic pen to ink a comic about a shark he made up that hates Christmas for some reason. It swims around the harbor eating people who are involved in any kind of Christmas activity.
The writing is bad, but at least it doesn't rely on all the parents being amazingly stupid and neglectful. Directing, acting, and production are neither particularly good nor particularly awful. It's the premise that's really hard to swallow.
https://youtu.be/pxYdm_vHRSA