I think in theory it was an easy election but I don't think for her it was. There is a huge well of racism and sexism in america that makes anyone not white male to run for the highest office and harder for each deviation from it. Biden holding past any primaries does take away from promoting democracy.
But her and the dems dropped the ball hard. They shut down the working weird rhetoric. They worked towards the right, a competition they would never win. They failed to create an image of enough change and hope to climb the cliff of bigotry she started at the bottom of.
We could get the Tates out of a Romanian jail but not a guy we sent to jail.