OK, the OP is wrong, American cars are not a bit shit... they're completely shit. The US is a place who thinks getting 270KW out of a 6.2L V8 is good. Europe (and Japan) can get that out of a 2L turbo these days.
We can also leave a car meet without ploughing into the crowd.
Also as a JDM fanboy, I have to say that Japan no longer makes the worlds best cars, hasn't done since the early 00's. Long gone are the days of budget super and sports cars rivalling their European counterparts for half the price. The Asian Fianancial Crisis and emissions regulations killed that and made all Japanese car companies ultra-conservative. The MKIV Supra by Toyota was compared with the Ferrari's of it's day, gone now. Same with the Honda NSX. The Honda S2000 is still considered the best in class roadster despite being killed off in 2009.
Same story with the Integras, Skylines, Sivlias, even the Z cars are watered down now.
If you want performance these days, Europe is killing everyone else at the moment. Japan doesn't seem to mind as they're making good money on whitegoods.
Also remember that European cars are very popular in the US. How often do you see a BMW X5, Audi Q7 or the latest Rangie?