Why Do The Movie Score And Prime's Face Seem So Sad?

I don't get why some hate or are indifferent towards the Transformers movie score. To me, parts of it, like "Autobots Descend", make it one of the best movie scores ever written. It goes right to the heart.
But I have to admit, I sometimes feel sad when I listen to it. It seems to have a sad and tragic tone to it. Is it just me?
Same with Prime's face. His face looks so sad for some reason. Sad and worn out. ET also had a sad look to him throughout his movie. And look what happened to him. So I'm wondering if this is all forshadowing to a tragedy that will befall Prime in the sequels. Is something horrible going to happen to Prime? Is he going to die?
But I have to admit, I sometimes feel sad when I listen to it. It seems to have a sad and tragic tone to it. Is it just me?
Same with Prime's face. His face looks so sad for some reason. Sad and worn out. ET also had a sad look to him throughout his movie. And look what happened to him. So I'm wondering if this is all forshadowing to a tragedy that will befall Prime in the sequels. Is something horrible going to happen to Prime? Is he going to die?