I don't blame Trump for the market collapse, you are projecting because you are incapable of actually having a discussion. Trump's problem however, is he tied himself to the market and economy so much that now that it is collapsing, he has nothing to tie himself to.
Honestly, what positions is he going to campaign on at this point? You named one thing, which isn't really that impactful to American's, and also isn't completely true. ISIS is still around, weakened, sure, but they are still around. Is that it? Is that the issue that is going to campaign on?
https://www.theatlantic.com/politics/archive/2020/02/kurdish-leader-isis-conflict-iraq-iran/606502/