Would like more information of comparison from Conrads book

Rating: Null/10 (23 December 1998)

After seeing the movie I feel that it really did not have to do as much with the war as the journey of one man through his personal insanity. all the members of the boat crew seemed to have a certin things in common with willard. The only survivour in the end was Lance who seemed to totally lose his mind and was even doing the dance and martial arts movements that willard did in the beginning of the movie. Then he kills Kurtz and gets Lance and leaves with him. does anyone have any insight on this thought or am I totally lost