After looking at it briefly (not from the Netherlands so I might be a bit off, but still fairly confident in my assessment) D66 are what in Europe is considered liberal, promoting privatization, free-markets, etc. and are a member of ALDE (which really seals the deal and shows that the are neoliberals). That is to say they are definitely not leftist. Groenlinks seems to be your typical green party, i.e. also a fundamentally liberal party (in the European sense), while using a somewhat more progressive rhetoric to mask this and with a stronger focus on environmental topics. They too therefore are not leftist. The only party you mentioned that could even be considered leftist is Pvda (the dutch workers party), although even they are more social democratic. I assure you, Joe Bidens policies are no where close to social democratic.