Bulgaria: Export surplus to Germany https://oec.world/en/profile/country/bgr
Romania: Balanced trade https://oec.world/en/profile/country/rou
Would you mind clarifying what you're referring to?
You need to own the value chain if you want to get richer.
So, thank you for shedding light on the whole of the German plot. I hadn't realized that the Eastern Europe countries were admitted to the EU so the German industry could source components and raw materials without import fees.
The only two alternatives are no trade, or a perfectly balanced trade. Neither one are realistic goals.