Simply not true. The helpful diagram you refer to does not consider the case where company A manufactures the packaging, company B buys the packaging, and then does a B2C delivery to another member state. In that case company B is the producer, even if B is a "micro-enterprise".

> the discussion here seems to have a lot of people who are in a big rush to demonize their perceived political opponents on ideological grounds.

No, it is the opposite. There are a whole lot of people trying to rationalize something crazy. Nevertheless, countless online shops in the EU run by small business have already closed thanks to these regulations. Even if your assertion that this is a giant misunderstanding were true, the damage is already done.