Sandy, What Arvind has started along with Anna was a great idea/ movement and moving in to politics to clean system from inside was a revolutionary. I had an impact on thought process of general population of India (Delhi). We selected him as our leader.
That's where honeymoon was over. He had an impact but screwed his chances by proving himself unreliable. Of course media and other political parties played a big role to defame him. But his own actions were bigger evil. He had a platform to show how a state can be run without corruption, can bring prosperity and education.
Instead he did things in haste without big picture and long term consequences of his actions. I may be wrong if his long term goal was to be MP and PM eventually.
In short we could see a transformation of a intellect and unselfish social worker to an opportunist politician in disguise of aam aadmi.
Moral of story : what you sow so shall you reap.