Probably as an over reaction to lost wages and the feeling of being completely unable to secure financial freedom for their family if they even had one which likely makes them feel like failures thus the hard pivot back to forceful ideology.
I mean unfortunately expectations of what a "man is" hasn't changed much since pre world wars with added consumerism since.
So it's equality where the equality is worse for everyone and social stigmas still are abound. It's a powder keg.
I mean minus South Korea, the graphs still show young men leaning left at pretty steady rates. More young women have moved left though, which is perhaps unsurprising given how hostile right wing politics is towards them. (And how open that's become recently)
Those "good old days" are mostly just an invention of modern propaganda, a narrative that people nowadays tell themselves about the past, so they have some sort of ideal reality to work towards and hope for the future. Norman Rockwell, George Quaintance type shit, and now you can have it AI generated. Never mind the leagues of working class men that still went underpaid, lived in shithole stick houses, died of the black lung, never mind the segregation and systemic racism and redlining which reinforced all this shit, never mind the fact that the system is and always has been a zero sum game with haves and have-nots. That all gets whitewashed, and people get presented some ahistorical vision of the good old days when you could get a king sized snickers for a nickel.