Yes this movie does poorly reflect 2012.
No what it portrays is not going to happen, or anything close to that.
I just want to point out a few things:
Mayans were spiritual beyond anyone's imagination. They did some ****ed up things to see some ****ed up things. But, they also discovered some amazing things. Certainly something will happen on the date (12/21/2012 @ 11:11AM GMT) but the question is how subtle will it be?
The biblical meaning of apocalypse is revelation. NOT world destruction. So now the question is, what kind of revelation will it be?
Some refer to 2012 as "the end of days" or "the end of time" take these literally, not metaphorically. 2012 may vary well be an end of our current recordings of time. It is pretty obvious to some how inaccurate our Gregorian calendar system is (see: leap year, random lost days over the course of a few thousand years, varying length months). The fact that we randomly say that 4:00 is now 3:00 or 3:00 is now 4:00 through daylight savings tells me something is a bit fishy with how we record time. Just goes to show how time is purely in our human minds.
Now to combine this all, perhaps the revelation will be one that brings us back into a more primitive mindset. And by primitive I don't mean savage, I mean we will move back more in line with nature, and from that, come up with a purely natural way to record time. Similar to the Mayan's calendar system based off the moon rather than our current system based off the sun.
One last thing:
Many crop circles this year that were unexplainable(yes there are some circles that are impossible to make as humans, people report feeling a particularly strange energy while standing in these) have patterns related to the Mayans. Check it out: http://www.crystalinks.com/cropcircles2009.html