I believe that what he did , he did in reaction but it was wrong. But what he assessed was right and he did make Germany great, improving her economic conditions dramatically. And if he hadn’t waged war on all fronts with almost all major states then ,and instead would concentrate one state each time, then I believe , he would have changed the map of Europe and made Germany a Super power for a long time.
How ever, if you read his auto biography, I have learned some good points about marriage. For instance he is against pornographic material which is a positive and cultural attitude , no matter if it comes from the pen of a dictator. He says that men who go to prostitutes to fulfill their hunger don’t become good husbands, Their strength weakens and their soul is corrupted and they are unable to satisfy their wives. Further he says that because of having more money , men delay their marriage which weakens them morally and physically when they marry in old age. And because of this the birth of healthy new generation is affected.
You can always learn good and postive from anything. I reffered Hitler because he did write many positive things in his book even if they were to wrongly glorify him or what ever.