There were certainly errors in the way Haringey handled the Baby P case, but Sharon Shoesmith (the Head of Children's Services) was demonised by the tabloids, as though she had murdered the child herself.
Ed Balls then stepped in and sacked her on the spot without any kind of hearing. Subsequently, the courts ruled he acted illegally.
I know nothing of Sharon Shoesmith personally, but it would appear that she was a former teacher, who had a job which was probably beyond her. She had no experience of social care. The problem was caused (ironically as a result of the Victoria Climbie case) by merging children's soocial care and education and creating new roles in 'children's services'. I don't think anybody has the expertise in both fields for the role.
Apparently Shoesmith had been much respected as a teacher, but was naive about social care. She might not have been up to the job, but she really didn't deserve the hatred which was directed at her. Ed Balls caved into populist pressure and fuelled the hatred.