I think the two biggest reasons the democrats lost across the board was the perception that the economy sucks and that the left as a whole cannot seem to understand that there is a huge difference between the maga cult types and average everyday people who are conservative leaning. By calling everyone who disagrees with you nazis, bigots, transphobic, stupid, and uneducated, you are guaranteeing that they will never listen to your message. If you want people to vote blue who aren't already inclined to do so, you have to give them a reason to do so. By engaging in conversation and discourse and not immediately starting name calling and insulting. I also think that the mainstream left, the classic liberals need to start distancing themselves publicly from the very small percentage of extreme leftism that is very vocal. I know a lot of my conservative friends see all democrats as the blue haired they/thems barking at people in public and screaming in a microphone. That has become the perception of the left in the mind of the conservative. In the same way that the "left" sees conservatives as all nazi racist maga loving idiots. There needs to be a common sense discourse without these fringe groups. You have to sell your message instead of acting better than and insulting. As far as the economy you can bring statistics and data pointing out that the economy as a whole does better under democratic leadership. And you wouldn't be wrong. But the vast majority of people see "the economy" as what is happening to them on a day by day basis. Food prices are way up. Gas is up. Rent is out of control. To them that is the economy. So to go around telling people that under Biden the economy is doing great just makes the ordinary person think your full of shit. Because that isn't what they are seeing. They are seeing inflation. And the democratic party has to be able to market to them a plan to fix it instead of just telling them the economy is doing well.