You're citing a capitalist finance website to prove your point about socialism. You seem to be confused between social democracy and democratic socialism. I understand because they seem so similar that they must be basically the same thing, right? Nope.
The Nordic model is a form of social democracy. They take many of the benefits that socialism provides and builds them into a capitalist economy. Democratic socialism is an actual form of a worker owned an operated economy.
If you're ever in doubt, ask the question, "who owns the means of production?" If the answer is huge megacorporations and wealthy billionaires, then it's a capitalist economy. If the answer is the working class, it's socialist.
They are the leftist party available.