read through the thread; it's anything but easy. he's hit the point where the ai civs have decided nuclear war is the way to go, and he's reaping the global penalties for it (radioactive wastelands, global warming) while simultaneously having to divert all his resources to maintaining the red queen race of building tanks and having them destroyed rather than cleaning up his farmlands to grow food.
so did i, but i pretty much always eliminated everyone else early on, or went for the alpha centauri victory. never tried playing out the total war scenario with balanced empires and nuclear weapons. but from the op, the problem is not winning from a clean state, it's that he's gotten himself into a bad situation and needs to get out.