I think I am just very sensitive to how America portrays other countries since I'm a foreigner. I don't know if the photographer is being biased, maybe just the article. I think there are more images in the original documentary. I totally don't remember what my bedroom look like when I was kid. I think I moved so much and had so many bedrooms, I only remember moving as a kid.
As an American, I think the photos of the American kids' rooms and the stories about their lives are just as horrible. On the one hand you have the rich, overacheiving kids - the one with all the trophies on display reminds me of Violet Blue from Willy Wonka - and the kid who spends his free time studying his finances on the bank website contrasted by the red-kneck kid with the shot gun and the little girl who is living in poverty. Not one of these kids are what I would think of as having a "normal" childhood.
My wife moved a lot as a kid too and it has definitely impacted her as an adult. It's something I'm very aware of now, I would like my kids to have a place they grew up with life long friends if possible. I provided a link to the original place I saw this work and without the a accompanying text, it's seemingly less biased. I think bias and ethnocentrism are qualities that don't belong solely to the US but I can understand your sensitivity.