I agree. HS is definitely the worst standalone park IMHO. That said, the ride-lineup is really elite for families without little kids.
Once I became a local, Hollywood became amazing, because if you treat Hollywood and Epcot as one mega park (as I began doing), it’s the best park in the world. Start in Hollywood, hit a few great rides, then hop to Epcot once you’re hungry and enjoy the food, shows, ambiance, etc.
Epcot primarily lacks elite attractions (especially until Guardians opened) whereas Hollywood pretty much only has elite attractions, so they’re really nice to have side-by-side.
To make DHS a complete park, it needs a lot, but honestly, once they get rid of the ugly in animation courtyard, I will be far less bothered by it.
Animal Kingdom is a spectacular park that needs quantity. It has everything else in a balanced format. It needs quantity of those formats. I would personally prefer stuff as Animal Kingdom in the short term (because I found myself not visiting often because of the lack of depth, even though I love the park), whereas the pitfalls of Hollywood can be more easily overcame.