Dean Israelite, the director of
Power Rangers, blamed his film's box-office performance on the film's PG-13 rating. He believes that if it had been given a PG rating, then it would've done better.
http://screenrant.com/power-rangers-rating-success/
I think after parents took their children to see 2014's
Teenage Mutant Ninja Turtles, they thought it had too much adult humor and sexual references that they didn't want to see
Out of the Shadows. Maybe those films and
Power Rangers should've been rated PG and had a "
Big Hero 6" type feel to it.