My thoughts and observations (spoilers)
I enjoyed the show overall since I like shows that combine various genres. This show combines elements of mystery, horror, teen drama and comedy. It's not the Addams Family that I remember from the 60's TV show BUT I never read the comics or watched the modern movies. The show reminds me of a twisted version of Harry Potter and Sabrina the Teenage Witch.
The Wednesday character is not likeable so I don't think the character can carry the show. It was also disturbing when Wednesday dropped piranhas in the pool and enthusiastically talked about killing and torturing people. Yuck! The other kids at the school have personality so they keep the show interesting. Wednesday is a Mary Sue devoid of personality and emotion. I found it to be annoying when a teenage girl can fix espresso machines, speak Italian and German, do archery trick shots, use martial arts to beat up three guys and has an encyclopedic knowledge of plants.
I hated to see Gwendolyn Christie's character die in the show since she was one of my favorite characters in Game of Thrones. I actually would have preferred to see the principal pick up the sword to take on the demon. I also didn't like seeing Uncle Fester portrayed as a criminal on the run who is a suspect in a bank robbery. Uncle Fester was weird on the 60's show but he wasn't a criminal.
Some of the social justice lectures might be annoying for some. It's a Netflix show so I have come to expect some social justice themes. Wednesday rails against the patriarchy and colonialism.