Who gives a shit about your sympathy? What matters is what can be changed in the future to prevent this outcome from happening again.
You seem to think the thing that needs to change is voters at large. I have no idea what your plan is to make that happen other than condescending lectures and shaming people into obedience, which, good luck with that. The things I'm saying should be done differently would only require a handful of politicians to change. So the question is, is it easier to change how a couple politicians behave, or how all of society behaves?
I agree with what MisterScruffy said. There were things that actually were within the democrats control that they could have done differently that would have allowed them to win. Blaming external factors outside of anyone's control that you have no solution for addressing is completely unproductive, and just an excuse.