I just remembered I posted this. I've been shit posting about the DNC for months on reddit. What a bunch of feckless morons.
The Democrats seem to like failure. Biden was a garbage presidential candidate who failed multiple times running for presidency. He managed to barely trip over the finish line ahead of Trump in 2020, in spite of the Covid pandemic giving him plenty of headwind. Realistically, he was too old to run in 2020 and looked terrible, but Covid allowed him to hide in a basement instead of campaigning and the DNC gifted him the nomination when everyone suddenly stepped aside to make sure Bernie didn't beat out a divided loyalist field. The debate solidified what a handful of people had been saying for months - Biden wasn't fit for office anymore (if he even was to begin with, which I doubt).
Harris couldn't even make it to the very first primary in her campaign. She was picked for VP because she was a black woman and a total party loyalist; completely mercenary in her views and devoid of any principle. Her campaign hid her, as the party loyalists had done with Biden, because she can't give a coherent answer to a question without a teleprompter and everything about her seems insincere. Shoving an unlikable VP from an unpopular administration down everyone's throats when Biden finally stepped aside was doomed to failure. There's no way she would have won an open primary. And obviously she couldn't beat Trump, in spite of all of his flaws. And it wasn't even close.