The full effects of this catastrophe won't be fully understood for a decade or more.
Just the mere fact of his winning has changed the texture of the world and put American leadership and international stability at risk.
Countries that once relied on American protection and consistency will start making their own defense plans. Russia and China will be able to exert more international influence and American democracy and the Supreme Court will be forever changed for the worse (least important).
This is to say nothing of Climate Change.
I'm in total shock and genuinely afraid.