Did the writers believe that just blowing stuff up would somehow cover for a bad story. Effects were great. The premise behind the movie is great. But then all these too incredible events occur. As with many prequels (can you say this with this movie?) the "early" machines and technology seems greater. Terminators were almost invincible. A bunch of military personnel not following orders and going on feelings. Open heart surgery done by field surgeons.
I love the first two. The third one fell off and this one real should end the series.