Even though I'll never vote for either of these genocidal neoliberal freaks, they are not the same. Saying one is bad because he is old is not an acceptable justification and it is ageism. The problem with Biden (regardless of his and his party's political orientation) is the fact that he is simply unsuitable for the job, he clearly doesn't have the mental and physical capacity for it. Trump on the other side (even though he's a fascist and regardless of the insane shit he says) is fine. He has the strength and mental clarity for the job. So don't compare Trump and Biden on this front, Trump can function just fine.
If we toss aside issues of ideology to focus just on technical ability to perform, I think you are missing a key factor. Electing a president is also electing the administration, and a president can only be as good as the people they surround themselves with. Biden knows how to assemble a solid team, while Trump doesn't. Trump is also incapable of listening to food advice, even in the rare instance where he allows it to be given to him.
Look at the issue of the newly expanded presidential immunity. The President is sheltered from prosecution for issuing an illegal order, but his staff is not required to follow that order. Which candidate will surround themselves with people who respect the law, and which candidate will surround themselves with lackeys?
I don't really think you can say for sure who has a better team and whatnot. That's an assumption and besides, Trump has proved that he knows exactly what he is doing with how consistently reactionary and neoliberal his term was. This pretty much shows that the decisions most of the time are not made by him, nor by any "team" he builds, but by the interests behind the conservative party. Likewise for Biden.
I don't want to sound like I'm defending Trump, I hate Trump and anything conservative/right wing with all my heart. I just want people to realize that when all that's left to talk about in public discourse is the mental capacity of the individual candidates and their criminal records, it is a sign of the narrowness of political differences of the parties, of absence of any important political point of confrontation. They have and historically had the same direction and interests with few differences on social issues that don't interfere with their interests. At some point people have to realize both parties are so similar and distant from any actual pressing problem in the world (genocide, climate change, billionaires) that the lesser evil doesn't hold up anymore - in every situation there is always a level of evilness that the lesser evil doesn't hold up when reached by both.
I don't really think you can say for sure who has a better team
Really? Just look at how many members of Trump's campaign and whitehouse staff have been charged or convicted with felonies. Look at how fast he went through chiefs of staff. Look at who is running his campaign today.
You got Trump right as a reactionary, but he is in no way a neoliberal. Neoliberals are not my cup of tea, but they are absolutely nuts for things like civility, following established norms, inclusiveness, immigration, and free trade.
Biden is a lifelong neoliberal who has miraculously made some pretty major moves away from neoliberal policies. It's a shame the term "Bidenomics" flopped, because there really is something to it. The Biden labor department has made significant changes to aid in unionization. The Chips Act and Inflation Reduction Act have brought a lot of key manufacturing back to the US, which is the antithesis of neoliberal doctrine.
Trump's economy was a disaster even before COVID hit. Supply chain issues started with his tariff war, unemployment was already growing, and inflation was already speeding up.
Even a Biden 20 years younger wouldn't be my choice of president but, against Trump, there is no contest.