I'm not sure if they have. The CW has made some pretty bad low points. Even then I don't think they've made anything worse than Titans S1 and S2. Maybe Arrow season 4, but even then I think that's slightly less terrible. That being said I don't think a CW Titans show would be a good fit either. Hell, I'm not sure if they're a good fit for live action in general. Also not optimistic about the Stargirl move.