No, it’s not. You have the right to return it (Dutch: herroepingsrecht) but the cost of returning can be at the expense of the buyer when stated on their webshop. Check their ToS
The article and the referred articles are about the return shipping fee, not about handling and so. For example, fashion retailer H&M are beginning to charge European countries too, perfectly fine with the law :)
Before the EU law, in Czechia where I live, most places wouldn't take a return at all. Most brick and mortar retailers still won't. So for me it was a big step up to be able to return at all. Losing a few bucks on shipping is small compared to having to keep a whole product you don't want. It's one of the big reasons I buy almost nothing from brick and mortar stores any more.