Double Standard

My son is 3 when he was 2 we went to the movies and he was allowed to watch teenage mutant ninja turtles who's age restriction is PG13 now we go and want to watch book of life to get told that my son can't go in who's age restriction is PG7 then another lady goes and purchases tickets by the self helpdesk with a smaller child but is allowed to go in so where the hell is that fair I mean I am the childs parent its a childrens movie ****ing double standards then they just stand there with a mouth full of teeth when I comment bout that lady and talk a bunch of **** that's ********