I agree. Biden's presidency was the biggest lost opportunity of my lifetime for exactly that reason.
FDR responded to a similar global challenge - the Great Depression - by transforming the American government to serve the needs of struggling Americans - and the American people rewarded his courage and vision with overwhelming support when he ran for his second term.
Biden? Barely tried to improve America. And everything he tried failed. He couldn't even reduce student loan payments. And when Harris had the opportunity to break with him and fight for her own vision of what America could be, she either had no vision of her own or was too afraid to fight for it.
The American "left" is terrified to promote anything more than a return to the Obama-era status quo. But if they don't find their vision and courage the United States is guaranteed one party Republican rule for another generation.