Well... it's for sure not the fault of Maddie and your DH getting mad at
her is not very mature IMHO...
She doesn't know that she did something wrong and she certainly didn't do it in spite. No offense but dogs will be dogs and puppies will be puppies and they chew on everything that's reachable. Good thing she wasn't hurt! An x-pen is the best solution and she won't feel bad about that. It's going to be her safe haven and she will feel protected from her scary environment.