It's the cord. For me, a max of six months of fiddling with the damn thing and it breaks.
I've had real headphones last quite a bit longer— but I buy the ones with replaceable cords. The pair I still have is on its fourth cord and second pair of muffs.
I don't view it as any sort of economic, human, or environmental catastrophe, that they stop holding a charge after... how long again? I've had a pair of Pros since before the pandemic which seem to hold up fine.
So I'm around what, twenty cents a day? It's a rare day I don't wear them for a solid hour.
It undermines the argument to pick the easy, lazy, and really rather bad example that everyone else flocks to for some bizarre reason. It's genuinely hard to come up with a better product category for glued-in batteries than in-ear wireless headphones.