A world after German victory wont necesserily turn out better than OTL but IMO its much more likely to do so on average. Of course there will be those who will be worse off than OTL as well.
However I made an argument in my previous post why even a victorious Germany will become a more democratic and better place. But it seems that an important point is that some people seem to think that Kaiserreich = Nazi Germany without the genocide. Thats hugely inaccurate. The Kaiserreich had no institutionalized racism and antisemitesm, no Nurnberger laws and remained a (flawed) democracy throughout its existence - which would likely change for the better. There was no Gestapo etc. And its true that the nazi's werent solely due to the Versailles treaty but its very hard to imagine them getting in to power without it.
Whats more a strong Germany that dominates Europe will provide stability in the continent. OTL the Entente could win thanks to the joint efforts of Brittain, France, Russia and the USA (not mentioning the less important ones). After the war the Soviets became a pariah state and the USA has withdrawn from the continent. The british werent interested in propping up a french hegemony in the continent. This basically ment that the potentially strongest player, Germany, if it could ever get its sh*t together would dominate the continent - and its priority would be to change the status quo.
If Germany wins the strongest power will be interested in maintaining the status quo. And the only power that could really threaten it on the continent - Russia - is not likely to form any alliances against it or become so strong as to confidently start a war against Germany.
I will renew my point about Africa: do you truly believe that a Germany with a larger portion of Africa will become less brutal than the French? I highly doubt it.
It was one of the most brutal colonizer, and I don't see them stop even if they become more democratic.
Democracy and brutality can come hand in hand see how the US treated black people at the time.
Now back to Europe: you say that Germany will want to keep the status quo. Sure, but how can it do it? It will need to have a brutal repression system in the land it vasselised in Eastern Europe, and even if more democratic, it won't be pretty.
It is easier to be brutal in officially foreign yet still controlled land than on your own, as strange as it can seems.
So all the land it got with Brest-Litovsk are not going to like it that much. I am not even sure Ukraine will be better treated by Germany than by Stalin. Which says a lot.
And this is only for the eastern part of Europe.
What is going to happen to the western part? There will be border changes. Too much blood has been spilled, and can see the what happened to Russia as reference. So what do you think will happen to France and Belgium?
What do you think will happen to the Netherland? Sure they were not invaded, but they are right next to a colossus now. What will it means for their society? Will they take a siege mentality? Will they become vassals in all but name?
Then there is the Italian problem. And Austria. Is Austria-Hungary intact? How will Italy be treated? And what the f**k will happen in the Balkan?
Seriously, I find it difficult to see how things will be "peaceful" in Europe, without very brutal repression to make the status quo stick.
And this is just Europe. Asia can turn to hell very quickly too. Remember there is still the Ottoman empire, which will likely continue to exist if Germany prop them up, and they were genocidal too.
Now it could all turn out to be a lot better. But Germany has appalling diplomacy since Bismark's death. So they truly don't have the best track record for leading to a better world.