The British media just love cannon-fodder like Susan Boyle, hence this sort of TV programme. Build them up then knock them down - a tired old formula, but it works every time and the British public is cruel enough to play along, voting against her in the final, just like a child pulling the wings off a butterfly. I suppose human nature never changes; human suffering is always amusing as long as you don't know the person personally.
She has a great voice, but she got dragged into the circus and the lions ripped her apart, just as scripted.