There's definitely scarce hope, at the end, unlike many a disaster movie[1]. You are certainly left with the idea that there's a Great Reset upon humanity, if not a complete decline and Game Over. And much of that residual hope would be far off-screen, with the 'global north' likely suffering to a varying range of degrees (and probably far too much of the 'global south' that is ultimately downwind - see also On The Beach).
That said, since seeing that I (partly for reasons of nuked cities, partly for when the zombie apocalypse arrived) have identified a nice spot up in the hills where - assuming I can even get through the initial events and then deal with the lingering dangers unleashed - I might
possibly be able to hole up a little easier[2] than down here where much of the remaining human chaos might do in the face of smashed infrastructure and roving bands of desperate looters. And I know some of the landscape in which the finale was set (it can be that bleak, or worse, on a regular day, and had the advantage of being able to point the camera away from any sign of still continuing civilisation that didn't fit the scenario being filmed at the time) plus very similar areas that are even
more isolated with handy hidey-holes in them.
[1] Where the few surviving (often 'accidental') heroes jet off to the eden-like planet, or get to ride the 'ark' to escape the worldwide megaquake tsunami, or find the 'shangri-la' valley where they can rebuild and defend against the zombie hordes/alien slime/whatever. At least until someone decides that they need a sequel and thus the tenuous protections they gained are put under stress that forces the new plot to accept its own wave of jeopardy.
[2] I never really imagined it'd ever work, unlike with
The Survivalist series of books which was basically 'gun porn' post-apocalyptic fantasy/sci-fi writ large where
of course one man (and his family, friends and mish-mash of various odd-ball alliances) can survive, thrive and make a difference for
hundreds of years into the future... Yeah, read that link (though that wikipage very badly needs editing for grammar and style!) to get the basic runthrough. Though I don't think I got beyond the twentieth-or-so book, myself, looking at the dates of publication and when I remember borrowing them from the library.