You had me until collapse. What are you picturing exactly? I think humans are really good at muddling through, and life will go on. I think enshittification is a better paradigm to think about the future than apocalypse
Just ignoring the massive devaluation of the dollar underway, the complete loss of the US' geopolitical standing (which China is rapidly taking over), and just the general economic collapse the US is likely to face (though don't worry, Herr Trump is going to fire everyone that doesn't sharpie fake numbers in)...
...the dissolution of the union. Already representatives from one state -- one that is actively destroying democracy to serve the agenda of rapist Trump -- are sheltering in the opposition camp's state, under the protection of its governor.
How long do people think this nonsense is going to continue? How long will better states endure having this human trash lording over them with their grievance and grift (remember that "free for the taxpayer" jet? Actually will cost taxpayers a billion dollars to be transferred to that criminal thief)?
Soon enough tax withholding will happen, there will be a struggle, and the divisions will arise.