The majority of the country was telling them "We are having change anxiety after Obama and we are having distrust in institutions after Covid". So what did they do? Cling to the same power structures with a dead man walking, doubled down on gender politics, devolved internally into morality based foreign policy shout match and the cherry on top put an uncharismatic non white woman as the candidate. At every step of the way they very eloquently and academically explained why they have the right solutions while completely ignoring the emotional state of the nation.
All they had to do was bring a calming white man that is not in cognitive decline that would reassure the nation that everything was going to be alright. That the America they know and love is here to stay.
You may don't like that this was reality, that your progressive views are more "right" than that, but it is. So now enjoy being factually, morally, academically correct with trump as the president with control on the congress. What a joke.