As a massive Jurassic Park fan, I loved the film and thought it was one of the best. A way better sequel than 2 or 3.
I actually loved the backstory with Lockwood and Hammond and how their relationship fractured when Lockwood wanted to clone his dead daughter, it was really interesting even if it didn't really add much to the movie itself.
I felt the ending with the Maisie pushing the button was well earned with the themes throughout the film of people seeing the dinosaurs as products, as clones, and not as real creatures.
The villain treated Maisie like she was less than as well, and she loves dinosaurs, so I felt like it was well set up.
I have always disliked how the movies made Hammond out to be a kindly old man though, he was an asshole in the books.