For the most part customer service is excellent from Swedish government agencies. There are exceptions with either poorly run or intentionally refunded agencies where it is not the case but usually the quality of customer service is excellent.

How can the government regulate car manufacturers when it produces no cars itself?

How are the two at all related

They don't.

What you do is have a real capitalist system with decent antitrust protections and real market competition instead a crony capitalist system where oligopolies can easily push regulators and legislators around.

And then, once you have enabled consumers to vote with their money, they will.

Perhaps some day we could try something other than fixing the problems of capitalism with more capitalism?

You've got the sheep and the wolf in sheep's clothing mixed up.

This kind of oligopolism, rent-seeking behavior, and general corruption are some of the problems capitalism was invented to fix. And the further societies stray away from actively defending a strong market economy, the more those problems start to come back.

We tried that last century.

Real capitalism just hasn't been tried yet /s