It's truly the worst theme park I've ever been to, and I am generally pretty forgiving about these things... I even liked California Adventure 1.0, which is actually a good point of comparison. As Disney's other infamous "worst park ever," when it opened it at least had a few great and unique rides (Soarin', Grizzly River Run, California Screamin') and a relatively cohesive creative direction, even if a solid 50% of that creative direction was "how many terrible puns about Hollywood can we come up with."
The Walt Disney Studios/Disney Adventure World has nothing, and I mean nothing, going for it. Visually it's like the parts of the Universal Studios Hollywood tram tour between the King Kong attraction and the big outdoor movie sets where you drive through a bunch of nondescript production offices and they have Jimmy Kimmel show up on the tram's monitors so you aren't bored to death, and the ride lineup is about as bad. Tower of Terror is good, I guess, and I didn't hate Crush's Coaster. Everything else ranges from mediocre to, well, whatever
Cars Road Trip is.