Also your comment about "shrinking population" - you are referring to white Americans right? You're welcome to go look for yourself to see Trump's election results from the last election and see how he increased voter share across blacks and hispanics (and maybe more). How is this "shrinking population" happening when Trump also had the most votes of any president in American history? Maybe the population isn't shrinking in the way that you think.
If you want to know why Democrats are losing elections despite it being so obvious they shouldn't, your comments and rejection of the reality that many Americans face every day is precisely why. And before you try and accuse me of being some Trump sycophant I have voted for Obama twice, Clinton, Biden, and then Harris and will be voting for Sherrod Brown and Amy Acton here in Ohio. Denying reality because you think that the picture other Americans see must be some right-wing propaganda feed is confusing you. It's simply not accurate. Most Americans do not agree with your point of view. If the Democrats want to start winning elections they better come to grips with reality.