It's a fair cop that not much happened on the watch of Gen X.
How much was under our control, though?
I have been telling people what will happen, on the rare occasions they want to hear it, since my twenties. I am 55 now.
The response went from "nah, that's ridiculous" to "but will it, really?" to " but what can I do?"

The time to effect change, IMHO is when you make your life choices early on, not once (if) you finally come the greasy pole.
The only means to change course on consumption is at the level of government and corporations; personal responsibility was used as a deliberate tactic to neuter the bottom line impact of entitlement concerns.
A case on point is the repeated argument "I can afford an electric, but I *need* to drive a lot and I worry about the range."
That argument satirises itself so I won't bother here.

I think we should also acknowledge that the problem is not the generations, it's the super consumers; people who have a new car every year, a new phone, a new kitchen, and 3 foreign holidays.
Fix their habits, and you will have achieved a huge impact at the greatest efficiency.
Something persuaded them that all those things were necessary to their life; I hope something else can persuade them of the converse.