How do you handle bullying from HR?

How do you handle bullying from HR? I love the organization I work for. I'm very passionate about the work I do (I'm in the non-profit sector), but recently our HR Director has become an absolute bully. <--- That's me phrasing her behavior nicely. There's gossip in the hallway, there is trash-talking lower members of the team loudly and in the hallway, exclusion, blaming, and excessive nitpicking. She has a habit of making my job 100x harder than it needs to be because she likes to find a small unimportant detail she thinks needs to be addressed NOW. I've even reached the point of not using any common area trash bins or recycle bins because we've reached the point that every mess in the office is my mess. It's exhausting. Just this morning she gave a detailed tour to a new employee explaining each empty office and each Director's office then "forgot" about my office were as she walked by. It's exhausting. I love what I do, but I'm not sure how to address this. I've brought up concerns before and the feedback received was "she just comes across harsh." Three employees have quite specifically because of this person. Any suggestions for addressing the concerns or how best to handle the situation?