Regardless of what motivates Anakin's attack-- and without getting into how to do this-- would anyone else feel better if Anakin had managed to achieve the slightest thing before being defeated? I mean, if he had only made Dukoo draw his light-saber and hold Anakin off before slapping him aside. If Anakin got that far, I could respect him a little more-- sense his raw, if untrained power.
I’m afraid I still I like the fact that he gets whumped straight away. Despite Anakin’s power and potential, the scene shows the essential need for a lack of attachment in a Jedi’s life and, ultimately, the failings that the Darkside will bring. He is so influenced by his emotions (so quick to anger) that this acts as a distraction from his training and Dooku uses this fact and, in effect, just whips the football away and sends the unfocused Jedi flying. Thereby giving more credence to Obi and his philosophy (and also to the fact that he, ultimately, failed in training Anakin).