Going back to the original question, I'll put in my two cents.
Staying away from the definition or good and evil, I think the answer lays in the definition of 'victory'. One of the things that made the Allies power so influential in both post-war areas was the sheer scale of their victory. In 1918 and 1945 the victors of the wars were in a position where they could do wathever they wanted of their spoils, and they did a lot of things. In 1918 France and the British Empire divided between them the colonial possessions of Germany and Turkey, imposed severe sanctions to Germany and mostly decided to ignore the demands of their other ally, leaving them frustated. In 1945, America had basically a freehand because everyone else was broke and even their major allies were now at the mercy of Washington's will. Together, France, the UK and the US imposed over the course of a lifetime a series of drastic and rapid changes to the geopolitics of the world. Societies, all of them, do not react smoothly to these kinds of fast-paced disturbance and in my opinion, this is the major factor that led to such a messy 20th century.
Now the reason I'm saying all of this is because I don't think Germany, or even all of the Central Powers for that matter, could achieve this kind of victory. Let's be honest, even in the best case scenarios (from their point of view) the CP are not going to dominate much outside of Europe. Their influence will not reach beyond the areas they have militarily conquered and they don't have the means to seriously challenge the other great powers 'in their backyards'. By all means, the victory Germany and friends are going to achieve -no matter how decisive- will be less far-reaching than what OTL Western Allies did. So this also means that even if no one can really say how good or bad the next hundred years are going to be, I would personally predict more progressive (i.e: slow) political reforms, no predominance of liberal democracy in the West, prolonged colonial rule in Africa and East Asia and a multipolar world where a single 'superpower' is very unlikely to arise.
This is not to say however that no further conflicts could arise. France for example is likely to want revenge but would not be in position to challenge Berlin alone and thus would have to seek the help of Britain and whatever is left of Russia by this time. In Asia, Japan will likely stay on course and continue to use China as a punching bag until its relations with America reaches a breaking point. A showdown in the Pacific is a real possibility and IMO isn't a question of 'if' but rather 'when'.
So a better world? Well I guess it depends where you live...