I'm not looking for any help, but thanks for your concern.
I don't make a habit of watching Biden speak, but I see occasional clips. I heard him speak in Israel yesterday and he did fine. Bear in mind, he's been dealing with a stutter/stammer since childhood, which most certainly affects his speaking performance. There's no doubt that he isn't as robust as he used to be but, if he was
truly in mental decline, why is it necessary to post doctored and out-of-context video to make it appear so.
The pro-Trump campaign attacking Biden’s mental health is ramping back up | Joe Biden | The Guardian
Just understand that, as a non-American, I look at US politics primarily from that perspective. While I want Americans to be well-served by their elected representatives, I'm more concerned about their impact on world affairs than the average American is likely to be. So, if say...Djibouti...went down the toilet, it would be disastrous for them, but probably inconsequential for the rest of the world. It would be a different story should that happen to the world's primary superpower. From that perspective, 2024 will be a defensive election - less about electing the next Lincoln or FDR, more about preventing another Trump term. If Biden is the only Dem candidate that independents and moderate Republicans would be willing to vote for in a contest against Trump, I see no alternative.
You stated that "Biden's advisors have done well". At least he was sufficiently on the ball to bring in good ones, while Trump surrounded himself with incompetent sycophants and grifters.
While I won't go so far as to equate Trump with Hitler, I predict that future historians will look back at his voters the same way they look at German voters in the 1930's: "What the fu@k were they thinking?!"