I don't know much about what Germany is experiencing, but even Germany's neighbors in the Netherlands and France seem to be having a renaissance predicated upon getting people out of their personal automobiles. Perhaps the problem is actually the outsized influence of the auto industry in Germany?

No, auto industry is dying in Germany and was more powerful in the past. German railway collapse is a recent phenomenon. It's the inverse: the Green push to make everyone use public transport is collapsing both the auto industry and public transit there.