It's not just the European cars which rot out due to corrosion around here, all makes and models do it. No one brand is terrifically worse than any other in terms of corroding away due to winter use.
A good number of people apply "undercoating" treatments to their cars around here. The creeping oil type treatments seem to provide a reasonable amount of protection with few downsides other than getting really messy when you need to work on the underside of the car. The rubberized types, if not applied properly and prior to any corrosion starting, seem to do more harm than good. But even undercoated cars will eventually succumb to corrosion. If you want a car to last here you store it away from about November till April.