Also, literally who cares. This isn't politics. Zoomers and millenials are very left-wing and that hasn't changer significantly in recent years. This isn't happening at scales that are shifting the political landscape. Idk why there is an obsession with this shit.
I guess my corollary to this, being somebody that is deeply entrenched within exactly the kind of personal hell that you're describing, is that I don't really think that you're going to fix or solve the mindset issue without first solving the material issue.
The fact is, or at least my experience is that the reason men adopt the mindset that they do is because it's required of them to actually compete, to keep themselves "alive", and to meet their needs within society as it is presently constituted. Unless you can directly prove that they can still achieve all those things, that they can still sustain themselves & exist as a meaningful member of society right now without having to compete in the ways that they do, then you don't have any real basis by which to argue against it other than acknowledging the fact that it's a fuckin' miserable existence that hurts themselves & others. Which yes it is, but the alternative is material squalor & total social disenfranchisement, you in fact might as well just fucking kill yourself in that scenario because you're going to die early, wretched, alone & unremarked upon anyways.
And like no you can't reasonably expect most people to be willing to take that option; that is IMO the problem with, and to some extent the paucity of the critique of Toxic Masculinity. It refuses to acknowledge that there are real material reasons why it exists; and it's not just some kind of bizarre cognitohazard that propagates completely independent of the social or material reality of the moment.