I couldn’t agree with you more. The democrats gave away most of the country (in square miles) to the republicans by totally failing to speak to the middle and working class. Their main messages have been: “Trump is a bad person” and “Democrats are nice people.”
Dems had plans for free college tuition at the cost of hundreds of billions but no plans on controlling Big Pharma, alternatives to college, raising wages for full-time workers, flight of manufacturing jobs, etc. Instead their big message was pushing for gender-appropriate bathrooms.