Because the British Monarchy is as much an institution as a house of individuals and really most of their perceived assistance to the NWO is just meaningless in the grandscheme of things and seems minimalist at best.
That, and the fact that Epstein as well as Prince Andrew were just two sick individuals operating on their own accord with the rest of House Windsor being unaware of his activities is another thing and when they did learn Andrew was pretty much blacklisted from then on.
In short there isn't enough dirt to get many to hate them and what little there is seems to be overexaggerated by UK Republicans to rid the UK of the monarchy and its traditions.
You think the monarchy is bad? A Labour led UK with no monarchy will revel in the cultural upheaval vacuum they will create in abolishing the monarchy with abandon and will endorse any policies you have accused the monarchs of perpetuating a thousand-fold.
I see the UK's Monarchist battle to keep the Monarchy in the same light as the U.S.'s in keeping the constitution, both are situations in which progressive minded individuals seek to destroy institutions which have guarded our societies for the past few hundred years effectively in the name of cheap 'progress' towards that ever approaching vision of Utopia/Dystopia over the horizon and discarding them because the royals have a slightly liberal bent is only ever playing into their hands.
In any case we have another thread for this
here.