Eh, it's fair in a way. Logic would go something like:
1. Forming substantial opposition movements is the first step to any successful change of systemic issues.
2. Leftists allowed said opposition movements to stay insignificant in favor of ignoring the problems out of fear for 20 years.
3. Therefor leftists bare a significant portion of the failure that lead to this point.
It's just not very useful. Okay, yeah, the previous generation of progressives have shirked their responsibilities. And had they lived up to them, we would have real, actionable solutions to our current problems in all likelihood. But they didn't. And now we have fascist candidates feasting upon the fallout of the endless bubble cycle of the economy. Doing the thing they should have done 20 years ago now isn't going to solve that problem anymore. And yelling at people about their failures isn't a solution.
So I dunno. I guess mostly I'm okay with someone just being angry for a little while, even if I'm disappointed at also advocating for non-solutions in a time-critical situation.