Guilty pleasures are one thing, but utterly delicious bits of television are something else entirely. Season 2 of Hulu ’s “ Rivals ,” the 1980s-set dark comedy adapted from Jilly Cooper’s “Rutshire Chronicles” novels, is exactly that. The series, which is set in the fictional county of Rutshire, England, follows an intense rivalry. Legendary television executive Lord Tony Baddingham ( David Tennant ), the managing director of Corinium, is on a rampage.  His former show host Declan O’Hara (