Umineko is interesting because people in Japan figured out the entire plot around chapter 3 and it made R07 utterly assmad. All the meta shit that comes after is a direct response to the japanese equivalent of 4chan calling him a hack nonstop. It's also why there's a character having a melty about annoying mystery fans in its later half.

Umineko is good the same way that Sanderson books are good. They're fucking phenomenal and groundbreaking if you're just getting into the respective genres but you'll soon realize they're pure slop once you actually read good vns/books.