When Robert Altman’s film “Nashville” was released in 1975, it left a bad taste in the mouths of many people in the town it hoped to portray. The film culminates with the assassination of its brightest star, a character modeled loosely on the rising career of Loretta Lynn, who died Tuesday at age 90. Before the film opened, Lynn had heard enough to keep her away. “I’d rather see ‘Bambi,’ ” she snapped to a New York Times reporter.