A user suggested that Democrats make this kind of post about Biden, so I did.
Too willing to compromise with an enemy that has repeatedly proven itself unwilling to do anything of the sort; I definitely fear he'll be too reconciliatory towards utterly recalcitrant, bad faith Republicans despite that strategy never working for Obama (or costing him far too much when it did).
Unlikely to pursue long overdue, substantive and greatly needed reforms to our healthcare system, taxes, environmental policy and economy, or to pursue economic justice and combat historically terrible income inequality that threatens to tear this country apart in the long run; that he's Wall Street's candidate of choice this cycle is truly alarming, though I'm not sure how much of this has to do with Trump just being a nexus of instability rather than Biden being thought of as a tool of their preferred policies, though I have no doubt they intend to utilize him to push those. In general, I have misgivings about him being progressive enough in policy to avoid serious long-term adverse consequences.
I have serious doubts about his willingness and capacity to substantively address the problems of racial justice, militarized and abusive policing in Amerca, especially with his VP pick that was a direct stab in the eye to BLM in light of her horrid and unethical prosecutorial history.
Is likely to be weak and too reconciliatory towards China; I think that Trump has been a disaster on this front by alienating traditional allies and smashing the coalitions we need to effectively pressure China, but at the same time, I rather doubt whether Biden, while repairing those relations, will be remotely tough enough on Xi's evil empire, especially as they've tyrannized Hong Kong, continue to genocide the Tibetans and Uyghurs, and browbeat our allies across the world.
Lastly, I do think he's grappling with early stage dementia, but even so, he's our candidate, unfortunately, and the alternative is far worse (and significantly dumber and more incompetent).