By Adam Bloodworth Hadestown review and star rating: ★★☆☆☆ It’s a longstanding truth of musical theatre that shows don’t need to be good to generate cult fan followings. We Will Rock You, Dear Evan Hansen and Wicked are adored by the public but some critics have given each of them a mauling. For this critic, Hadestown fits that bill: I’m glad it’s here for the girls behind me who cried through multiple parts and spent the interval discussing which parts made their eyes leak the most, but new viewers might find their tear ducts running dry. Hadestown is based on the ancient Greek myth of Orpheu…