Satan's Brew (1976)

Walter, a German anarchist poet, is short of money after his publisher refuses to give him an advance. He tries various ways of raising money, including shooting one of his mistresses and relying on the life savings of a woman from the country who is fanatically devoted to him. He also has to contend with his long-suffering wife, his fly-obsessed crazy brother, his other mistress and a police murder investigation.