At least in Germany, many of these copyright claims have no real legal grounds and wouldn’t hold up in an actual trial. All cases I’ve read into so far ended with a settlement - as the private person was too afraid of even more legal fees. Or were dropped completely after a while (full of empty threats) if the people never engaged with the other party.
I figured this when IKEA started throwing out their current model for £5 a pop. Judging by how fast their stock was gone, they‘ll show up on ebay for a hefty markup any time now…