He wasn't a superb anything except being a great orator. His book is an incoherent mess. After the war a the Nuremberg trials, of course everyone is going to say he was the brain behind everything. Above that he was fragile. He dropped out of school because he was embarrassed that he was poor. If you read the intelligence briefs by the U.S. and Britian, he was a paranoid mess that was sexual dysfunction and incapable connecting to other people. At no point as a politician did he show any cunningness or political awareness. He slipped by in a three way election, cleaned out his party by just killing everyone that might be a threat during the Night of Long Knives, develop a crippling addiction to drugs, and wreck the entire country. It is impressive what he did but winning an election is hardly an intelligence test. There is no shortage of really stupid people in politics. The idea that the jews and non-Aryan blood was he reason why Germany lost WW1 is pretty stupid, even back than when so many in Germany had jewish relatives.
Everything that Germany did during the war that was impressive was largely the result Germany being heavily industrialized and the scientific and research center of the world. Hitler barely squeaked into power but someone like him would have existed just due to the many in the country wanting to blame someone for their post WW1 plight.