A casual observation of mine which I find intriguing me is that people who tend to make such complaints are largely just as obnoxious and objectionable as their targets.
Here's a description from '08 https://www.theguardian.com/education/2008/aug/29/bullying.s... but that was just from a quick google, I first learned it in a university developmental psychology course 10 years earlier (which is to say my source is actually peer reviewed research)
Turns out, the way to "win" in bullying is to "disengage" and let it go.