Rat Race 1980 on netflix

Young dynamic executive, married and father of two children, Jérôme Ozendron dreams of writing and escaping a life he considers mediocre. The meeting with a former comrade, who had become an actor, brought him into contact with the world of cinema. He meets, Natacha, a cover girl, for whom he is ready to give up, wife and children. Then he becomes the lover of Lilianne, a marginal who persecutes and pursues him. He quit his job to devote himself to writing a novel. But nothing goes as he wants.