When Rohm was deemed to have gotten too big for his boots, Hitler had him killed. External opponents such as the Communists were also eradicated either by violence in the form of the SS or legal means (Hitler banned all other political parties). This example serves as yet another component of the strength of the Fuhrer's dictatorship - by combining the brute force of the SS as well as the constitutional powers invested in him by his position of Chancellor, Hitler was guaranteed absolute power. Furthermore by replacing the judiciary with hand picked judges as well as amalgamating the SS and police force and having the army swear an oath of loyalty to him, Hitler had cemented control over all pillars of law and order.
Hitler may have been criticised as lazy and indecisive, but there are clear examples of him taking matters into his own hands, as well as taking advice sometimes unpopular) from no one but himself. Examples include; rearming the Rhineland and defying his own generals, signing the Pact with Poland and defying his own peoples wishes as well as personally bullying Austrian Chancellor Schuschnigg and Czech President Hacha into giving in to his invasion threats. .
Intentionalists also argue that the idea of Hitler being branded as "weak" is preposterous in light of certain other facts. For example; it took six years and the combined efforts of UK, USA and the Soviet Union to topple Hitler's empire. It is also noted that Hitler lacked any serious opposition to his dictatorship. Assassination attempts were few and far between and uprisings never exceeded a few brave and extreme individuals. Groups such as the Edelweiss Pirates may have been awarded a sizeable number of text book pages in the past half century, though it is unlikely that Hitler ever lost a proportionate amount of sleep over the threat they posed. On top of this, Hitler had enough support from the German people to allow him the ability to follow obscure and controversial policies such as the holocaust.