Nu.nl is pretty good at being biased (lot of trolls/propagandists in the comments too due to bad moderation). I don't think it's purposeful though they're not a real news agency, their team is very small. As a result a lot of their "news" is straight up Chinese/Russian propaganda, they do add a "according to x" at the start of those articles but they don't explore what was said, or highlight and address the obvious lies. Or maybe they do have bad intentions who knows (they're thought to be owned by a Belgian billionaires family, who've been in media for a long time. (the site and the company that owns the site are run by that family, but that company is owned by another one who's ownership is not public knowledge.