Your analysis is wrong. The basic problem of the Democrats has been the reluctance of White voters to vote for them.
Since LBJ pushed through the Civil Rights and Voting Rights legislation not a single Democratic candidate for president has gotten a majority of the White vote.
Not saying Trumpublicans are racist or anything but 2 out of 3 White voters, votes Trumpublican.
In 2020 that translated into 42% of the national overall vote. That's the "base vote" that Republican candidates start with.
In states with low populations that are 80% to 90% White. That 2 out of 3 White voters mean total Republican dominance of those states forever.
For a Democrat to win, they have to get a good turnout of the Black, Hispanic, Asian, Pacific Islander, and Indigenous voters. Then they have to get every White Voter they possibly can and maybe that will be enough.
Frequently it's not.
That basic demographic problem has been the "Gordian Knot" problem the party has tried to solve since Reagan finished Nixon's "Southern Strategy" and fused White Evangelical voters with White Southern Racist voters as the foundation of the Republican Party.
It's very easy to be critical and talk about "pandering" but after 1980 and Reagan it would have been very easy for the Democrats to have lost every single election after that.
People forget, the only reason Clinton beat Bush, was that Ross Perot split the Republican vote. If Perot hadn't run we could be living under a permanent Bush family dynasty.
There is a reason Progressive ideas were pushed to the fringe of the Democratic party. They don't bring in White voters.
In fact, every time someone ran on even vaguely Progressive positions. They lost.
THEY ALWAYS LOST, EVERY FUCKING TIME FOR THE LAST 50 YEARS.
They always lost because White voters rejected them.
So, how exactly do you think the Democratic Progressives are going to overcome that problem? What's going to be different this time?
Unless you are talking real numbers you are just bullshitting about how unhappy you are that things aren't the way you would like them to be.