I'll give you a free preview, assuming the movie is anything like the book.
The main character is a whining pussy who, despite being a Marine sniper, is a huge shitbird. He tells military urban legends as if they happened to him, which he probably thought he could get away with since noone who has been in the Marines would read that piece of shit cover to cover.
He brags about doing all kinds of wonderful things, like putting a gun to another Marine's head, and seems to feel traumatized even though his combat experience, if he has any, is minor. I don't recall him saying anything about actually fighting.
I'm going to go out on a limb and sum his movie and book up in three words. Fucking liberal bullshit.