movies fail when they don't market properly, and also when their premiers are planned during a terrible month. Ex: a rambo movie being released the day after a school shooting takes place. usually movies will release during spring and summer, because august and winter are considered 'dump months' and have the lowest turnout of the entire year
movies should be considered 'failed' when they gross less than 1.2 of their movie's budget. a movie being bad or not well received doesn't count as a failure, because the team behind the movie still end up making millions.