I like your writing , thanks for this. I'm 'old' but I side with millennials every time I hear the boomer bellyache song about millennials. I sympathize 100% with you and I feel you've described it accurately. I don't care if some grandparents lived through WWII because at least when they came out of it there was enormous opportunity and prosperity, all you had to do was have arms and legs and you had a good job, benefits and education for your kids.
What can millennials do now that they've inherited a truly broken country and a fractured socioeconomic landscape where the upper tectonic plate is creating wealth for the fortunate and well placed, while the lower plate is sinking away into third world levels of poverty and severance from opportunity. Move to the Nordics?
I suspect millennials will rewrite the rules over the next two decades, as the boomers age out and die their ideas will die too, and you'll be able to smash a few myths about hard work and opportunity. Once they were true, but they are no longer true today.