smaller Big Joseph?; the little kid prone to anger who smashes the TV

In the latter half of chapter three, we travel with Jojo into a meth-abuse household of a mother and her son and father who is apparently out in the shed.  It has some large stressful points in the scene, such as when the kid gets increasingly angry and smashes his TV, his mom's leg, then likewise is beaten to an unfair extent, clearly showing the level of abuse in the household especially when the threat of worse is apparently a potential from the father.   My question is:  what is the significance of this scene, other than to show the types of people Misty clearly does "business" with?