Why do you consider the possibility of Germany winning the war to be a bad thing? Perhaps it could have turned out worse than the hundred millions plus murdered in our timeline, but it is hard to see how the world could have done worse than what did happen.
Other than that, all I can say is that the whole episode was utterly horrific and indescribably bloody. Prior wars had killed their tens of thousands, but this one killed over ten million. It was mechanized slaughter on a scale never seen before, with an average daily death count of over seven thousand, all for a stalemate of essentially four years. I can't imagine enduring such a thing.