Nah, he didn't say Bruce Wayne was directly responsible for the criminals with mental health issues becoming super villains and terrorizing Gotham. He said that Bruce Wayne probably feels guilt for not finding a philanthropic solution to the mental health problem, which generates those super villains. He maybe suggested that Batman was directly responsible for the fate of a few Robins and Barbara Gordon, however, but that doesn't necessarily mean that Bruce actually responsible, so much as it means that he feels responsible for them.

Pretty much, I think Pete is getting at the idea that there are a lot of reasons to believe that Bruce/Batman has mental health issues. Maybe a personality disorder, too. Of course, I can't really speak for him, but yeah.