Brother, I'm with you. There is no way I am not voting for the Democratic candidate for President--or any other office--in November.
But at the risk (or certainty) of being labeled an over-reactor, I am 100% certain that if Joe Biden is the nominee then we will lose. And I am equally certain that we will lose the House and the Senate. Because if you watched that debate with anything other than the most partisan of goggles, you saw a man who frequently could not complete a coherent thought. It was the worst debate performance by a presidential candidate since we started having the damned things in 1960. That's not an exaggeration. It was the worst. It was worse event than Trump's performance in 2020, because at least he played to what his base wanted to see (i.e., an obnoxious loudmouth with an aversion to facts and truth).
And we can make excuses all day. And maybe some of those excuses have some basis in fact. But they're not going to be persuasive to people who currently need to be persuaded to (1) show up to vote, and (2) vote for Joe Biden. "He had a cold"; "he's busy with a real job"; "his advisors prepared him badly"--perhaps all of those are true. And it won't change the mind of anybody who isn't planning to vote for Joe Biden today to vote for him in November.
And if the Democratic Party can't get its shit together and get a nominee with an actual chance of winning, then that indicates a complete failure of the party structure. And that's going to have real down-ballot consequences.
I appreciate @linux and @troph observing the obvious--that the Republic depends on the outcome of this election and we need to work to defend it. But if the Democratic Party--including its various officeholders--put the Party's power structure and need not to cross an incumbent president above saving the Republic, . . . well, I just don't know what to tell you.
As a final thought--my reservations with Joe Biden in 2020 were entirely wrapped up in his failure to run in 2016. Anybody who knew anything about politics knew that Hillary Clinton was a weak candidate, but that Joe would've won in a landslide over Trump. But Biden didn't run because he was sad about Beau's death. I mean, ok. I get it. That's a valid thing. But at the same time, the Republic needed you in that hour, and you didn't answer the bell.
And now it's the opposite. The Republic needs Joe Biden to stand down. But he's looking for all the world like he's going to put his personal interests ahead of the Republic in 2024. And in so doing, once again hand the presidency to Donald Trump.