They support him out of desperation, out of the belief that he will meaningfully change something. That he will halt the decline, that he will stop the endless overseas wars fought in the interests of Raytheon's profits and that he will "drain the swamp" of the oligarchs that hold the real power.
They think to themselves that Trump just didn't get the chance to drain it last time, that his time was simply cut short, that he didn't quickly acquire enough power to curb the oligarchs, that the COVID-19 pandemic stole his momentum, that he was undermined by loyal swamp denizens in his administration like Pence and Bolton.
Trump was a snake oil salesman that sold them the product of himself and just like any salesman what he really wanted was personal profit. He's never going to drain the swamp. He's as much a toad as the rest of its denizens.
The only thing he truly hated about the oligarch political dynasties was that he and his clan weren't amongst their ranks. The reason the established dynasties hate him is because they hate the idea of an outsider waltzing in and setting his own place at the table without kissing feet first. The petty lawfare launched against him was very much real. Apart from that, Trump is useful in making voters believe that there is some meaningful fundamental choice to be made when there actually isn't.
Trump will still ultimately answer to the same interests as the rest of the political establishment, just like he did last time because it was in his personal interest to. There will be no meaningful change because the system is designed so that people cannot vote against it. There is no voting out of the quagmire that is the swamp. The Hegemony Wars waged in the interests of Raytheon's wallet and BlackRock's investments will continue, Yanks and their children will die to to defend apartheid Zionism and the oligarchs will continue to plunder the decaying corpse of the United States until there is nothing left to horde.
Nothing short of revolution or separatism is going to allow people to escape the system.
