That would require making positive, pragmatic suggestions that could improve the lives of the average person, rather than moralizing and kowtowing to the special interest groups and wealthy donors who have captured the party. Good luck with that.
As it is we now have two parties obsessed with “regulating” the morality of citizens while bleeding them out financially.
No, it would require overcoming a shameless demagogue and enablers who have no problem blatantly lying about everything to everyone.
Democracy has been known since its invention to be extremely vulnerable to such actors. It's vulnerable to it because it's nearly impossible to counter.
Your critique is valid to some degree, but Trump won simply because he had the shamelessness to lie over and over and over again that he'd bring prices down. That's it.
No "positive, pragmatic suggestions" are electorally stronger than simple untruths stated with confidence ad infinitum.