Association board cant stand up to condo owner bully

We live in a 184 unit condo building. We have a resident who harrases, yells at and attacks other residents and staff.  So far our board of directors and management has not stopped her. They say they are trying to go about it legally but it has been over 3 years and it continues.  She has taken over the indoor swimming pool the exercise room and pretty much all public areas.  Is there nothing the board of directors can do or do we all have to continue to live this way?