I have played all the witcher games and only read 3 witcher books, the last wish, sword of destiny and blood elves. It is so easy to say that the books are better for so many series and games, just because books can tell more in depth about the characters and worlds. I have to admit CD Project Red just nailed the games, I enjoyed them more than the books. With that said there is nothing wrong with the storytelling in the books.
I have seen all the episodes of the Netflix serie. There are a ton of references and storylines one would only understand if they had more knowledge in the witcher lore.