There are already services that do that, e.g. firma.de[0]

But in general, not really. I also just founded a GmbH in Germany, and the paperwork really isn't that crazy, and for the more complicated parts you'll generally will want to have a tax advisor you are going to have a long-term relationship with (rather than a one-off founding service). I considered using a founding service, but ultimately, most of the "hard parts" about the process is in understanding what agency you have to talk to for what parts, which you'll have to learn anyways if you want to run a business in a way that doesn't land you in jail, so the benefits of such a service are marginal.

The only real way to streamline it would be to deregulate the process (e.g. getting rid of notary requirement).

[0]: https://www.firma.de

Yes, there are ways to buy up existing “empty” companies with a bank account, commercial registration, etc. If you want to found a new one, there are also services that will prepare all paperwork and set up appointments with notaries, etc. for you for affordable prices Day to day operations do generally not require much else than bookkeeping and accounting which you can almost fully outsource (though accountant fees are not cheap, however, doing it yourself is also not to hard if you have the right software and do not sell thousands of different products) unless you are in specific industries There are a few unnecessary fees and it takes longer than it should to get started but for most businesses it does not really matter and is limited in scope when it comes to time and money needed