Somehow I always got the impression that he started out good, but despite all his work, he got screwed in the end and his mind snapped. Here he was respected, looked up to, and then once he was disfigured, he saw that little of his work actually made a difference (in his opinion). Couple that with the fact that he started following his "false idol" of a coin, and he's converted entirely to evil by the hopelessnes of it all.
Of course that's just my feeling on the whole thing, though I think the viral is giving a lot of boost to that view. After all, we see the people love him. Then we see there are a lot of bad men out there who will do anything to oppose him and the people drop him very easily. Then he's a hero again. This is just the start of his carreer really, and already he's on the roller coaster from hell. Stress like that could make anyone snap eventually. Once he looks like a freak, there will be no hope to keep the public on his side. I just wonder if we will get to his scarring in this movie, or if they are already setting up a third in the series with this whole back-story.