I think there needs to be a balance when it comes to prepping. The most important prep is psychological and communal. If you are constantly bombarding your household with yelling about the end of the world, that makes everyone tense and on-edge. If you are obsessed to the point that you lose sleep over this stuff, then you aren't stable enough to actually cope with it if it does happen.
I try to focus my efforts on preparing what I can, and developing personal skills such as martial arts, languages, engineering, wildlife survival, and getting to know the neighbors. A lot of this stuff can be split up if you know a neighbor who gardens, then you don't need to learn gardening. You can trade and share skills evenly, and that helps even just in regular day-to-day life, not just for "doomsday" scenarios.
A lot of people get obsessed with the idea of an end-of-the-world scenarios because they are mentally unwell, and believe such a thing would give them a blank slate. It allows them to get lost in escapist fantasies of being heroic and saving the day, when most likely what would happen is that they would wind up in a severe crisis, because they lack the skills to truly deal with an apocalyptic event.
Your husband has to start looking after himself, and his family. Otherwise, he's going to drag you all down before any civil war gets a chance.