While i do agree with owidjaja's point that Germanys choice of allies was a major reason for their defeat ( its one of the main ones), i still think that the entry of the US is the major reason. Because of the Luddenhorf offensive. If it continued the way that it started, then it would've pushed the allied line back significantly. They did gain back some territory with it. The use of stormtroopers was a very clever tactic. In principle, if the US had not entered when they did, Germany may not have won outright, but it would've done a serious amount of damage to the Allied effort. Lets not forget that the British and French had also been fighting the same war, it had taken its toll on them too, they were not immune.
In terms of Germany, being a totalitarian state:
What is totalitarianism?
Definition of Totalitarianism
The essence of totalitarianism can be found in its very name; it is a form of rule in which the government attempts to maintain 'total' control over society, including all aspects of the public and private lives of its citizens.
There are several characteristics that are common to totalitarian regimes, including:
Rule by a single party
Total control of the military
Total control over means of communication (such as newspapers, propaganda, etc…)
Police control with the use of terror as a control tactic
Control of the economy
Are these not all common characteristics of Nazi Germany?
Total control and rule by a single party? The nazi party became the only political party in germany at that time
Total control of the military? Hitler was the Fuher-the army pledged alliegence to him as the fuher of Germany
Total control over means of communication (such as newspapers, propaganda, etc…)? There was no such thing as freedom of the press. Joseph Gobbells and others made lots of propaganda in order to rasie levels of nationalism and anti-semitism
Police control with the use of terror as a control tactic? Yeah-the Gestappo as well as the SS and SD, and in the beginning there was the violent SA
Control of the economy? certainly-The nazi party controlled everything
So looking at this from a macro perspective, i believe Nazi Germany emulated a totalitarian state.
On a micro level, there was indeed problems hence my arguement is not perfect