He grew up in a rich and powerful family that was viewed as slightly less than respectable in the highest circles. As a result, he had a chip on his shoulder his entire life.
He swaggered and loved displays of military might. Contemptuous of rules, he put his faith completely in power. He took on his country’s political establishment and destroyed traditional foreign alliances shortly after taking power. His bluster alienated almost every nation in the neighborhood. His subordinates viewed him as a loose cannon who was incapable of being restrained; on more than one occasion, that turned out to be true.
In the end, he wrote a blank check to the one remaining ally his country had, and the result was disastrous. He lost his job, and his country lost the war.
Is it Trump or Kaiser Wilhelm II? Time will tell.