I‘m sure it’s not as simple, but my first take on this was: Europe doesn’t invest in EVs, but China does. They start to loose the Chinese market and are about to loose their own market to China as well. Then politics steps in to “rescue” their own companies but all that does is shelter them from the pressure to adapt and evolve, and in the end they’re beyond hope and left in the dust while the advanced Chinese cars dominate everything.
Countering subsidies with import taxes is a different story ofc. But it certainly feels like the European car industry is in decline and it’s probably their own fault. If not in Europe most certainly in China.
I should add that I have no idea what I’m talking about here, so feel free to tell me where I’m wrong.
Take a look at what VW did to the British car market with illegal subsidies from the German Government. Then look at VW being caught in the emissions scandle. Long story short, cheating is profitable.