You're a much better articulator of political reality than most people on the Internet, thanks! Though I disagree with you on your perspective of the contemporary Democratic, I enjoyed reading your thoughts.
I think you're mistaking the mainstream Democratic Party for the few most outspoken and far left progressives in a way that would be like accusing all Republicans of being extreme Know-Nothings like Marjorie Taylor Green, Lauren Boebert, and Louie Gohmert.
I think just about all of the Democratic Party's main platform planks, and certainly the few and spead out pieces of legislation they've manage to pass through this Congress, are toward the classical liberal ideals of promoting equality of opportunity. Democrats get called "radical," "socialist," and "communist" all the time, but the things that mainstream Democrats want, like raising taxes on the top marginal rate from 35% to 39%, or having a coherent healthcare system that isn't the most costly and least equitable in the developed world, and shifting away from filling the atmosphere with carbon, and trying to promote society's comfort with racial, sexual, and gender diversity so people stop hurting minorities physically and mentally so they don't kill themselves, and having some kind of sensible gun control reform so that elementary school attendance isn't a leading cause of death for children are all things that promote that baseline level of equality of opportunity for which you credit classical liberalism.