€58 a month for all local/regional public transport is very cheap.

Where I am, in another part of western Europe, a single-region ticket is normally ~30-50% more expensive than the all-of-Germany ticket.

It is subsidized. Through taxes you pay the full prize anyways. Just that someone else than you who decides, what do with your money, like subsidized public transport.

Nothing is more subsidised than cars and their infrastructure.