De Paay is a crappy zoo; the only reasons I have visited it multiple times is it's collection of small carnivores and owls and the fact that it is very close to more or less the main highway of the Netherlands (the A2), so I have made a couple of rather quick visits returning home from zoos or museums in the southern part of the Netherlands.
Best isn't really great either, but the worst zoo in the Netherlands for me is Blanckendael-park (although the owner is called Blankendaal, but the name of the park sounds fancier). Everywhere the same green fences and cages, oryxes on concrete floors... I work quite often in Tuitjenhorn, so when I could leave early sometime last year, I decided to give the park another try several years after my first visit. Eventually, I didn't visit; the entrence fee is absurd and you have to pay to park your car.