I probably shouldn't bother (plot holes)

Would it even matter or be worth it to point out all the inconsistencies in this movie?
I think the most glaring one is the slim likelihood of a guy and girl wanting to make out immediately after -- digging up a grave; witnessing rat-chewed corpses; seeing someone burn to death; escaping a blown-up mall.
Oh, and I wanted more backstory. And more closure at the end. Explanation of the aftermath. Seriously. This was worse than Silent Night, Deadly Night.