Good: Constantine's problems are his own, he's not a role model for all men who LIVE IN A SOCIETY.
Bad: I don't know if it's just the first episode or the entire series, but it's stooped in exposition which isn't great.
Bad: The fucking heart monitor, Jesus, that's not how it works. Little girl is possessed cliche. They're making the supernatural way too mundane, it's ruining the fun.
Good: Dad is sufficiently freaked out to see a stripper walk out of his daughter's hospital room.
Bad: I'm supposed to care about these characters but I don't, they're all bland gloomy and bland angsty.
Good: The stripper demon who's the most interesting character gets more screen time.
Good: Finally something interesting. The show should have started with this scene.
Bad: Narration. We don't need narration, we can see what the fuck is happening.
Can't really compare it to Harley Quinn because it's not a comedy. For a single episode of an action show it's okay, if you start with the interesting part, put the possessed kid in the middle, and finish with the setup for the rest of the show.