He could have started by not paying the reparations instead. You think he could have said: "Okay, so, you know, we kinda built a strong war machine here, so you can fuck off with your reparations or start another very constly war that nobody knows if you will win it." Or he could have not attacked American civilian vessels in his god complex, and maybe he could have actually won. Or he could have not taken advantage of deeply ingrained racism in the population to blame an entire race of people for the situation of WW1, and maybe history wouldn't judge him as harshly as it does, for, you know, the actual holocaust that happened. Just some ideas here.