Man, Bruce can get as emo as Peter Parker sometimes. This is a lot like AMAZING SPIDER-MAN EXTRA #3, where Spider-Man says he taints the people around him like a disease carrier.
Of course, part of Bruce's appeal is that he knows how screwed up he is, and how he seems to taint or ruin the lives of people around him, and how the rest of the JLA only keep him around for battle tactics. When he really amps up the Batdickery it's kind of like him saying "Fine, I'll just hate everyone right back."
Tim going GRIMDARK, when he first joined up just so Bruce wouldn't be GRIMDARK, is very ironic. Of course, Dan DiDio has crapped all over Tim Drake for years, and even Steph coming back hasn't lightened him up.