If your life is this hectic at the moment, is there a reason you own so many high energy dogs? Pits are terriers; they need exercise or they will be destructive. That’s just how they roll. They don’t only need a romp in the yard, but also mental exercise, something they get from walks with all the new scents and sights.
Maybe you should look into a dog walker or something. It sounds he’s just a frustrated, bored and untrained animal.
ETA: Although there are many different kinds of ‘pits’, the American Pit Bull Terrier is meant to a sleek animal. ‘Pocket pits’ are a mixture of different breeds sold at high prices that often come with health problems because of their build.