To each their own, but I think these type of comments do nothing but stir debate. Fine if you don't like everything, but you could make the same comment about a lot of parks... including Disney.
Epic Universe has a lot of great attractions & experiences, and they obviously intend on adding more throughout its life.
Based on general guest observation - Stardust, Monsters, Ministry, Untrainable Dragon and Hiccup's are a major success in the park... 5 right there.
Fine category - Mario Kart, Donkey Kong, Cirque Arcanus, Carousel
Then there's (3) duds - Werewolf, Racer Rally, Yoshi
Animal Kingdom is my favorite park... and yet I can say that there's only 3 good rides in the park and the rest are one and done. Everybody is going to have their own tastes and preferences.
There are sightline issues and capacity concerns, but Epic is not a failure. (I do think the ticketing scheme is ultimately going to hurt them at the end.)