Why Kamala lost and Trump won big

After years of our lives being taken up by the campaign for the US presidency, we finally have a result. And against the apparent polling, it is a clear and unambiguous result. Donald Trump has performed the most remarkable political comeback, has cemented his role as a transformational president in the politics of the United States, and at a stroke has removed his legal woes and avoided any likelihood of going to prison. How did the Democrats lose this, when they felt they had fought a "nearly flawless" campaign and outspent Trump three to one?