Based on both the reviews and word of mouth, I went into Target Margin's "re-envisioning" of Show Boat (here called Show/Boat: A River) with low expectations. Sadly, it lived down to them. Whatever the faults of Oscar Hammerstein II, he was a sincere man trying to make the world a better place. Show Boat was sympathetic to a mixed-race couple, depicted and criticized racism, and had an unprecedented cast of Bla…