Yes, we are doomed.
But not because some old Mayans tell us we are.
Matter of fact, it's already been postponed to 2212, look it up.
We are doomed by simply existing, because we humans are simply selfdestructive.
We don't like something, we bomb the shit out of it.
We're gonna go extinct sooner or later, so all these environmentalists can go stick a tree up their buttocks.
The earth's not gonna notice anyway, we're fucking up the world WE live in, and not the world itself.
Earth's gonna shake it's booty once and it'll be alright.
Seeing as, say, Mars has done quite nicely without human help.
Probably because of the lack of atmosphere, but hey. That's beyond my point.
Conclusion:
Yes, we are doomed.
Because we exist.
I thank you for your time.