It's been debunked multiple times over the last quarter century. Every time people kinda forget because it feels like recycling should be a good thing, and everyone just goes back to pretending it is. ☹️
except here in sweden we're verifiably recycling a significant percentage of our plastics, and have like.. the world leading recycling facility.
It's clearly doable, countries just opt not to invest in the facilities to actually do it, and rather than reaching the obvious conclusion of "just build the recycling facilities" people conclude that plastic apparently cannot be recycled (despite evidence to the contrary).
The article makes other points, such as that using plastic is more environmentally friendly most of the time (I am not convinced they use a broad enough definition though, as they only consider transport fuel usage and energy costs of creating glass or cardboard), and that recycling plastics is possible and valid an we have the technology to do this well but we just, well, don't do it well.