By Stephanie Zacharek December 25, 2024 6:00 AM EST T he Bob Dylan of James Mangold’s extraordinary anti-biopic A Complete Unknown —who may or may not be an accurate version of the real Bob Dylan —is a jerk. He blows into New York in 1961, at age 19, having hitched a ride in a station wagon with just a rucksack and guitar in tow. He wastes not a minute looking for his idol, Woody Guthrie. “I want to meet Woody," he says. "Maybe catch a spark.” He finds Guthrie not in New York but in a New