no economy today prices in all these externalities. the form of capitalism you're defending is a fantasy, not a purer form that it can be reformed into
My recycling all goes in the same bin - plastic, paper, glass etc barbaric as that is.
If it turns out boxes from X are not recyclable - then I can only hope that the mass of them "reducing the profits of big waste corp" triggers a phone call from them to X and action happens - either the two parties come to an agreement or the waste company spends 50c sending me a flyer saying "please dont cost us $1000 by putting that packaging in your bin" or alternatively spends $5 an hour having someone on the line pick them out.
Its capitalism, not even a liberal fantasy land model of capitalism, but a filthy greedy sweatshop child labour exploititive form of capitalism - thats how it is meant to work.