Because Dems have not performed well with the most important and powerful demographic:
STRAIGHT WHITE MEN.
They don't see a reason to support Democrats, hence why WI/MI/PA went to Trump in '16 and is a swing state again in '24.
Why are you so obsessed with race?
Also, you missed the point. Democrats are the party that IS in touch with what voters want, which is why they consistently get the most votes. The only reason Republicans are competitive at all is because by accident the system is rigged in their favor. The reason Republicans don't do well is they have nothing to offer the average voter.
Dems don't have a message for white males, so why get upset when the Boomer Esiasons and the Mitch McConnells stymie the Democratic agenda?
Dems have an agenda for every racial bloc but SWM, hell, even white women aren't so Republican. White women are called Becky and Karen all day long by leftwing people, why should they support Dems if they are not going to be respected to earn their vote?
Why are you so obsessed with race?
Also, nobody cares what Boomer Esiason thinks - most Americans don't even know he exists. As for your weird idea as to what white women are called - my wife has never been called either of those names in her entire life.
I think your main issue is 1) you're not american and 2) even if you were you're completely out of touch with what real america thinks. If you're wondering why the Republicans you support (and let's not kid ourselves, you do) lose so much it's because they are totally out of touch too.