World's Greatest Dad movie plot

Kylehas always had a lot of dissatisfaction with his father, especially when he entered puberty, this dissatisfaction has become stronger and stronger. The father of his dreams should be a brave and strong head of the family, rather than a life-long job as a high school teacher like his current father. Disappointed with his father, Kyle often quarreled with his father, and every time everyone broke up. And Lanceas a father is not what Kyle sees. Lance likes to read books and newspapers, and his dream is to become a writer. Although Lance always eats the publishing house's closed doors, he always feels that he is working hard in the direction of a writer, although he always eats the publishing house's closed doors. Lance likes Claire, the art teacher at the school, but a young male teacher at the school seems to be more of Claire's favor. Later, Kyle unexpectedly took photos of Claire's underwear and masturbated in extreme ways at home. When Lance found out, it was too late   .