The US operates on a fundamentally different scale from most other countries. It's so big and diverse (in terms of both people and biomes) that the only effective way to organize is heavily federated. Fire laws in California are very different from in Tennessee. There are a few ways to accurately paint Americans in broad strokes, but not many.

I'd encourage you to travel around America a bit. Foreigners are often shocked by how nice and helpful people are here. Americans are by far the most financially charitable people in the world [1] but can be famously neighborly in many more ways than that.

[1]: https://en.m.wikipedia.org/wiki/List_of_countries_by_charita...