I think the earth is too large to have an Armageddon over a very short period of time (perhaps the span of one life.) Instead, things become worse at local scale. Yemen has been having (and continues to have? I haven't kept up) a nice, local Armageddon. The United States is large, and well resourced. Short of nuclear war, there will be nice places in the US for a long time, even if the overall measure of things becomes objectively worse. It may just be that "disaster" and "Armageddon," as BurningFrog has suggest is a pretty bad heuristic. The climate crisis is quite real, but it won't make the whole earth unlivable in a short period of time. Instead, some places will get worse, and humanity will be squeezed into different locales.

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I do accept that it could become a whole-earth disaster that affects everything, but my point is that this may take generations.