European mass-market brands all got a bad reputation here ... even VW, which is well-regarded in Europe. Just imagine what would happen if Citroen or Renault were to attempt to sell something under those brand names here. The Fiat brand name isn't likely to survive much longer in North America - but they're huge in South America.
YES, the last time a Citroen or Renault was sold under their own name in North America, was before the auto industry in general had figured out corrosion protection. Japanese cars back then (1980s) rusted just as badly, but somehow they got away with it.
European roads are filled with Renaults, Citroens, Fiats, VWs and all their cousins (Seat, Skoda) as well as European Ford and GM (Opel, Vauxhall), and they seem to do okay with them ... and Honda (well-regarded here) have a hard time surviving in Europe! Seems that Australians don't buy Honda cars, either. Honda are considered to be pensioners' cars in the UK.
Modern manufacturing processes have converged in many ways. Everyone builds stuff in more-or-less the same ways using similar materials nowadays, with parts and subassemblies bought in from the same core groups of suppliers for each type of product. Buy whatever suits your needs.