You didn't miss anything. Well, the only good scenes outside of the fighting were with Kong and the deaf girl. That was the only other worthy concept/plot line in the whole movie. It was basically like they filmed a Kong movie and a Godzilla movie, took a handful of scenes from each randomly and put the movies together. Basically, two separate movies, the characters from each don't really ever intersect, except for being in the same city where the Titans fight at the end. For each side its like the other titan doesn't exist. It feels so disjointed and weird, not to mention they throw in a token bad dude (who is very one dimensional and hardly used) just so there is a reason to go to a badly conceptualized hollow Earth and so he can create a new foe for the Titans. It is so terribly written. It pisses me off they made such a payday for that trash they call a movie.