I think our current monetary system is more than only slightly useful.
That has nothing to do with the quote you’re responding to, about economic models that don’t reflect reality. The problem is economic models built without an adequate understanding of the current monetary system.
Many trillions of words have been written about this since the crash. This is a useful short summary which links to some of them.
I mean, yeah. All of this. Absurd.
But, FWIW, offloading cheap tat onto charity shops is not going to work well. It costs them money to put it on a shelf and it probably takes up more space than it is worth. Plus, they very likely can’t sell electrical equipment that has had its cord chopped up and repaired, or at least not without spending more on having it tested than they could sell it for anyway.
Next time, find a friend with small feet who would like to take it off your hands.