Other then the fact the Balkans are hardly anything but stable and not exactly happy at the current situation. Nordic countries completely uninterested in military and economic domination and want to keep the Germans at a healthy distance. Germans already hard handed policy in the east would not make them popular, as we can see in Poland. France, Italy and Russia who are nothing to be dismissed and I doubt they would truly care to much about how it’s allies are like to get what they want. And the UK has all the reason to completely oppose Germany.I feel skeptical that a Germany that dominates all of Eastern Europe (bar a rump Russia), the Balkans and has friendly relations with the Nordics wouldn't "win the peace". 20's, 30's and 40's France will be puny compared to OTL, both militarily and economically. Italy will become a failed state in the short term(I don't see how this can't happen the way things are being portrayed) that will be incapable of exerting itself militarily after it attempt to reorganize itself. Russia will also pose no threat, having lost Ukraine, Belarus and perhaps the north Caucasus. How is it supposed to develop the heavy industry of OTL without these regions providing food and oil? If Russia is Bolshevik then not even Britain will prop them up. Many Americans probably will feel sympathetic to German in this scenario, they will see the war as having been a useless one against a country who wasn't fundamentally hostile to America. For example, I don't see how when Republicans take back the white house they would have any incentive in continuing the pro-British, anti-German foreign policy of Wilson. That would just hurt America economically.
In short, a victorious Germany has 0 military threats on the continent. If tensions ratchet up in the 30's or 40's, they could march into Paris, the Po valley, or Petrograd no problem. If they are militarily, economically, and diplomatically stronger than OTL Nazi Germany then this should be easy for them. As just one example, most of Eastern Europe, bar perhaps Poland, should be strongly pro-German and anti-Russian, as long as the Germans play their cards right. That's Finland, the Baltics and Ukraine as a buffer against a weakened Russia.
TLDR, Revisionist Italy, France and Russia don't stand a chance against the Central Powers, Germany will dominate Europe for the next few decades.
They might be able to militarily dominate the 20s, but beyond that? Your overestimating the stability of the German control