If a small-medium sized company exports a product, it's very difficult to get involved in recycling/disposal, and there are a lot of small-medium sized companies exporting. Not everyone has a subsidiary in every province of every country, and shipping all used products back to HQ is probably more carbon-intensive than just throwing stuff in a landfill.

But you can solve this systematically by just having that medium sized company pay for it. They don't have to do it; but they have to pay for it; meaning the cost will be transferred along to the end user.