That the Transformers films, brought to us jointly by Hasbro’s accountancy department and the jock-bro personality of Michael Bay, are bad is nearly common knowledge. But few Hollywood franchises have so aggressively courted the kind of sublime awfulness to which audiences have been subjected every second summer or so in recent memory. At the beginning of Age of Extinction, the fourth in the franchise and scripted by series regular Ehren Kruger, Optimus Prime is introduced hiding out in an abandoned movie theatre, where the old-timer owner bemoans the state of modern cinema. “It’s all sequels and reboots!” he complains, a…