You say that, but Biden dominated the Primary in 2020. I wanted Warren. I’d have been ok with Bernie. But I have to admit, Biden just had so many more votes.
The US is filled with conservatives. Most Democratic voters are simply sane conservatives. Biden is their idea of a good candidate. An economic neoliberal that believes in modest safety nets and personal freedom when not at the expense of others. More importantly, he believes in compromise (something Democrats need because their constituents are not single-issue voters, and often have different opinions on the issues)
It would be cool if more people were more progressive in the US. But the media doesn’t really want to make that possible.