4 ideas
Loranga is a father who flatly refuses to behave like a grown-up. He lives with his son Masarin, while the grandfather, Dartanjang, lives in the woodshed rather than the house. The book builds its episodes from this arrangement: a household whose nominal head acts like a child and whose eldest member lives at the margins, yet which still holds together as a family.
When the person holding the parent role behaves like a child, the conventions of adulthood stop looking like laws of nature and start looking like optional habits. Readers can see which grown-up rules actually protect people and which exist only because adults are expected to follow them.
Children's fiction does not need to model correct behavior or deliver a lesson to be valuable. By refusing to punish its disorderly adults or restore conventional order, anarchic humor tells young readers that grown-up authority is made by people and can be laughed at. That laughter is a way for children to gain some mastery over a world adults control.
A family can look dysfunctional by every outward standard and still work, because belonging comes from mutual acceptance rather than proper roles or living arrangements. A grandfather in a woodshed and a father who won't grow up count as a failure only if you judge them against a template. Judged by whether the members tolerate and enjoy each other, they succeed.