Big opportunity was missed by this movie

Rating: 6/10 (29 December 2018)

The screenplay writer and the director together commited this unfinished and incomplete movie that missed so many opportunities to be a really unforgettable bit. There were so many opportunities that were not exploited but this was how it was.
And the parent behavior again.. my feeling is that
A. Most of the movies have not "Parental Consultant" who helps the still "single" staff (e.g.: director, actor, actress, etc.) on how a regular parent acts in a certain situation.
B. Directors just don't care of making a movie that follows the correct behaviour patterns of the regular parents.
C. We parents (including me) as just stupid as we are represented by theses movies.
I'm not wishing to point out every single parental mistake of this movie BUT one.
In a such dangerous situation that is presented in this movie why the (of course caring) parents leave the youngest kid without guardian as the last person in the queue when they go outside... I just don't understand.