It's all well to bash DSS and all social service child welfare agenices. However, most do the best they can do under law.
It is when laws change that how things are handled are changed.
A child service worker in most states that I know is not law enforcement. You can't barge into someones home, break the door down, and remove the child.
In most cases, that takes a court order, a law enforcement escort, and what is considered
'proof of abuse/neglect'.
Believe it or not, this is not easy to get. Families don't have to open a door to you. They can dodge workers, avoid phone calls, refuse to open doors. Then, when they finally decide to open the door, they may have 'fixed' things. Many who are in positions of abusing a child know how to hide it well.
Child services workers are very often pretty young in the state I live. It may be their first job out of College, and they may be young and inexperienced. The turnover of this job is often high.
No argument the system is broken. How to fix it and impliment the changes to make things better is what's needed.