I guess it wasn't that super terrible…but it's quite weak. The human characters are awful, specially the kids and the fat militar guy that's supposed to be the villain or something? So terrible and lame. Mostly everyone is lame, and the plot is uber stupid.
Also, with so much advanced weaponry present I never felt much of a credible threat, even when the kids are alone there's not a lot of tension. And the ending climax is...meh.
People in the cinema went bananas over the 10987640 references to the first movie, but what about you try to make something new with its own personality, which this didn't have? And honestly, I felt every wink to the first JP was a bit of a desperate attempt to get people pumped.
Some decent scenes here and there, but overall weak. Hell, even when it's time for chaos and dinosaur carnage the movie is so tame and harmless...you had one fucking job, movie.