Endless Dialogue.
Your movie is nothing more than a lot of glorified dialogue. You need to work on your storytelling. We're forced to endure a long scene regarding ammunition that seems to go on and on forever, which is more or less pointless, since in the next scene we're not focusing on any one person anyways. And then they all get killed, rendering that dialogue even more useless.
Why were the robots bickering? This is not a plot point. You seem to be filling in time.
Fifteen people cannot repopulate a large force in fifty years.
Your epilogue borders on ridiculous. It's convoluted; you've got 5 minutes worth of story in the animation, then hundreds of years of story in text? And then all is for naught? Why even bother telling the story at all?
I don't mean to sound harsh, but you've got to work on your storytelling skills. I would go back, re-write it, and try again.