For years the USA had a protected market. The lack of a foreign dealer market and parts support was a non tariff barrier to entry. There were also tariff barriers. Then the freight cost, since the handling cost was large.
Then a few large foreign makers decided to enter the market as a multi-year effort. The solved the parts and dealer probler, and developed RORO car carriers (RORO = Roll On - Roll off), where dedicated car carrying ships were made with the ability to drive cars onto special tracked and cleated decks, so each car could be tied down front and rear with fast latching equipment, they could be loaded as fast as drivers could drive them in with many entry points..
That cut the freight cost and delay down greatly .
Then they attacked the planned obsolescence concept, with cars that outlasted US cars by years. The USA tried to fight back with style changes, but the mileage laws that made the fleet efficiency increase over time, forced a streamlined efficiency = better drag co-coefficient = cars all started to adopt shapes mandated by the efficiency = look alike = less fashio,
Europeans and Asians have always wanted cars that lasted longer = less rust = better paint and galvanizing.