What, pray tell, does the American market do wrong?
Does it personally upset you that American consumers don't want station wagons? As said, they're available here.
@vipergts2207 reminded me of the Subaru Outback, which by my observation is probably the most popular wagon on the American roads. I do know people who will own nothing else(it's a pretty widely varied demographic, but I would also say skewed somewhat toward active/outdoors type folks, although by no means a monopoly on that market), but they're the exception rather than the rule.
We DO have Fiats here. I had one dealer joke with me that if I bought another new FCA product, he'd give me a 126 for free if I wanted it-apparently the dealers are stuffed to the gills with cars that aren't selling. Peugot exited the market here sometime in the late 80s or early 90s, and I don't know when Renault and Citroen were last sold-French cars are often the butt of jokes here, and not cars that people get excited about buying.
We've had discussions in the past about the fact that there's really no market for bare-bones base model cars in the US-dealers don't routinely stock event the ones that are cataloged because they don't sell. By and large, what market DOES exist for them is pretty well filled by the Korean makers, or at least from what I've seen.
You can say you don't care about the American market, but at the same time it's a pretty darn large market for cars. It gets discussed in this thread a lot because most of the regular posters here live in America.