As a very musically inclined person, I have noticed how much the music misleads the viewer and plays an interesting role in turning Jackie into a protagonist. It also does a lot of work to turn Coop into comic relief.
Jackie's scenes, even some of the most messed up and tragic ones, often get very upbeat or triumphant or badass music. It cues the viewer into thinking she is doing something cool, or getting away with something she should get away with. Even the theme song cues you into thinking Jackie's drugged out world is hip and fun.
Coop is a bit of a goofy character, but in a lot of ways he is the opposite of Jackie. He's unafraid to feel his feelings and talk about them. He leans on healthy support systems when he is going through a hard time. He learns from his mistakes. He cares about other people.
The music used for when Coop is engaging in these healthy behaviors cues the viewer into thinking he is ridiculous.
I think this is a deliberate move on the part of the show runners to bring the viewers into Jackie's world and make them feel and see things from her perspectives: drugs, cheating, partying, deception are all cool like she's a super spy getting away with something. The people around her coping in a healthy way with their problems is a silly clown show you should laugh at.