A character from a well like or decent to a unlikable character by fans.
Seriously, this title is the only thing that I can think of. Basically, Fallen To The Scrappy Heap is about a character who used to be well liked by fans. But then, the writer screwed up by making this character taking a level of Jerkass., making the character wins all the time and turns the character into a pony lover. Of course, peoples started to hate that character. Contrast to Rescued from the Scrappy Heap, where the character went from unlikable rewritten in a way that it becomes likable.