2021 | R | 2h 10min “The Green Knight” Rotten Tomatoes score: The Critics: 90 percent—Fresh! The People: 52 percent—Rotten! “The Green Knight,” a film adaptation of the Arthurian poem “Sir Gawain and the Green Knight,” is one of those languid, art-house-type moody tone-poem movies that cause critics to wax poetic and audiences to hate it. I’m with the people. Why? It’s boring! Zero tension. Pretty? Yes, but I insist of movies that they do not violate the No. 1 rule of show business: “Never be boring.” What Happens Gawain (Dev Patel, yes, the Indian actor—this is the version where Indians and black folks lived in Great Britain in the 14th century) belongs to the court of King Arthur (Sean Harris) and hopes one day to be knighted. He’s got a woman named Essel (Alicia Vikander), whom he relegates to the woodpile due to her, er, lowly station. On Christmas Day, …