Hardly. CPS workers testified and pleaded with two different judges in this case. They were ignored. The girl's adoptive parents (the Kavanaughs) lost custody of her due to an incompetent lawyer. After that, the girl was returned to these monsters. It sealed her doom.
There are many reasons for this. One is the attitude that kids should stay with families, and the government is there to "help families work" (a liberal fallacy, of course; only when there is extreme dysfunction, as in this case, should the government step in and then it should be with the welfare of the CHILDREN in mind, not some bogus, long-discredited Feminist notion of "helping these women learn skills.")
Another is that the courts are simply overburdened, resulting in many cases falling "through the cracks."
You will get a lot of bloviating here on FR against CPS, but the fact is the great majority of CPS workers have very frustrating jobs in which they are privileged to see children abused on a daily basis with no one to help them.