Jenna Ortega as Wednesday, Enid as Wednesday's foil, Thing, and the dance in episode four are the good bits.
Everything else, not so much. My impression was that the whole point of the Addams Family was that they had no idea they were in any way unusual, so having them accept being 'outcasts' would already seem to misunderstand a big part of the main joke. Having the school be a Poundshop Hogwarts, filled with werewolves and vampires etc, was also not only pointless when Wednesday is set up as not initially fitting in (why wouldn't she in such a place?) but the whole premise would have been far more robust had it taken place in a regular school. Also, why is she doing kung-fu?