That was certainly true for my daughter while attending a Catholic school.  I eventually pulled her out in the middle of her eighth grade year.  The blindness by staff as to who the bullies were was perfectly obvious.  What made it even worse for my daughter was the fact it was happening with impunity in a Catholic school where kids were supposed to be taught to be followers of Jesus.  She told me it was much easier to take in public schools where there were no such expectations.