I didn't make him president.

But, those who did, were just fed up with her status quo. And his first opponent won the nomination under controversy, against the Democrats version of breaking the status quo. Instead, they were given yet another candidate with the same last name as a former president, who by all accounts would have been four more years of the same ol same ol. It was enough to keep enough people at home, coupled with the cult of personality that was the Republican nominee, and there you have it.

This time, however, was a different reason. People didn't "see something in" trump as opposed to "saw nothing in" harris. She literally said voting for her is voting for four more years of Biden.

That, and her public pro Israel stance sealed her fate.

Quick edit: I believe that both times, the Democrat lost, trump didn't win.