The courts are irrelevant. They won't allow the building of his ballroom, but they won't stop the construction either. They won't allow his face on a coin, but they've been minted already and are about to go on sale. They won't allow him permission to keep attacking Iran, but he's depleting all our weaponry to do so while killing them. They won't allow him to build his big arch monstrosity, but he's breaking ground on it right now. They won't allow him to have his name on the Kennedy building, but he's putting it back.
Last term they wouldn't allow the military on the border. They're there now. Last term they wouldn't allow funding for it, he siphoned it off Army Corp of Engineers' budget. Did Congress allocate any money for his border wall this time? It's still being built.
The only thing that stopped him from taking over on January 6th, 2021 was Mike Pence, and there were at least other members of his cabinet and also in the military who wouldn't go along with it if Trump tried. Also, if it was for Dan Quayle talking to him, who knows what Pence would have done. Not this time. There's nobody to listen to Quayle now.