system
Given the following post, respond as if you're commenting on Reddit:
human
[The Walking Dead] Is the humanity doomed?

He don't see any real signs of survival of anything else than a small group of people. No planes/helicopters.

Sure, we also don't know about other countries (and perhaps some US states, because there's no much information about these places). 

The walkers don't seem to "disintegrate" over time, as should be expected. The last survivors seem to be dying off, and they are usually so few of them...

Is there's any sign of hope?
gpt
Nah, humanity as a whole will survive, though in greatly reduced numbers. The group has run across enough other groups of survivors to establish that there are probably significant settlements elsewhere. In colder regions, zombies will freeze, or at least substantially slow down, and their numbers will thus be much thinner. Islands, plateaus, and other areas with naturally defensible terrain will probably be the major areas of concentration for these surviving settlements. 

Humanity will have to have a major culture shift if the whole "you come back no matter how you die" thing continues in to subsequent generations. Also, the end of industrialized civilization will obviously result in huge cultural shifts. 

All told, humanity will continue, but it will probably be on a level more akin to the pre-industrial age after a few decades.