Wealth tax to collect more money to give to Israel and the most lethal military and killing immigrants is what she ran on, she ran as a right wing populist and lost because Trump is a better right wing populist
Small minded voters are told what to think, Harris refused to tell them to want free healthcare because that shit pisses off donors
Yes, Democrats don't know how politics works, they ask Republicans to decide which issues are important, and then argue a slightly more moderate response to those issues is best. Sometimes they accidentally win doing that, if the economy is good and people are happy with moderation, but that's probably not going to be true any time soon.