How bad is it? Technically, it's not bad, but it certainly is unseemly.
Should you see it? Yes, unless you've been registered as a pedophile.
This exploitation classic starts with the admonition that child marriages must be stopped and then goes on to show why, in the most exploitative way manageable. There's a famous skinnydipping scene that shows an 11 or 12 year-old girl in the nude; it's done with restraint, though there is a man slobbering all over himself while watching her. There's a fall in a pigpen, a lot of dresses torn in interesting ways to reveal flesh not commonly seen in 1938 films and the hero that saves the day is dwarf actor Angelo Rossitto. The film quality and acting are tolerable, it's just the subject matter that makes some people call this terrible.