User blog comment:Touchinos/“Raising Hell” Discussion/@comment-26982641-20191018231031/@comment-10889355-20191019134136

Calling Castiel "useless" is a bit of a stretch, no? He still played a considerable role in the episode—his dialogue with Dean is a step forward in terms of their relationship. It's made clear to us that Dean isn't mad directly at Cas, he's mad at everything.

Doctor49, have you not watched the season premiere? Cas was literally smiting those hell spawned ghosts and when Dean suggested Cas to smite everyone, Cas did say that he can't do that because he'd be overwhelmed.