Yes - the CoC seems powerless to stop the problem. That guy recognised that earlier and dropped out of the CoC board; eventually he followed others who dropped out of the project.

From what I can determine, this is not one of those “omg the newfangled CoC is driving people away” situations, but rather “we have an asshole in our midst and, despite all the big words about CoC, nothing actually gets done about it, so I’m out”.