Learn when to walk away, if only for your own health. Even surrounding yourself with shitpost and meme communities can't keep it at bay, as you can see.
I would say the issue is that it is relatable. In most cases, I don't think people would be feeling the doom if they weren't affected (in this case, I don't think a healthy and happy person with a decent wage/job would feel anxious from this post).
Also even escapism (using media) isn't perfect both because old settings paint a picture of community/assurances that don't exist for the viewer, and even in dystopia something needs to drive the plot forward (well, somewhat less so with anything less focused on action/plot).
I mean I totally understand ignoring certain types of doom, for instance if MAD or an E.M.P. (/carrington event) happens I don't really see any "preparing" for that so I don't even bother thinking about it.