I think if you make a significant group of people the boogeymen in your cultural map of the world, you can't be surprised when they don't come out and vote for you. The 'patriarchy' as explained by the left, is a nebulous term that often means, whichever way you turn in the ideological maze, it's a man's fault. It's become so ingrained in the notion of identity and feminism that nobody is really questioning what it is, what it means or how it works. This is a massive problem, because it means feminism itself has ceased to become a strive towards parity and fairness, and at its best becomes a much needed way of solving problems pertinent only to women - and at its worst, a club for publicly denigrating men.
I'm not surprised men didn't vote for Harris, they should've done, but I'm not surprised they didn't. I'm also not surprised their more conservative mothers, sisters and friends didn't either. Gender roles are changing in the modern world, both sexes are struggling to manage this change - but the left doesn't really see it like that. It sees it as oppressor (men) and oppressed (women) and frames most discussions that way. If you kick against that, and I do from time to time, then you're part of the problem - not, as i often suggest I am, a more pragmatic solution than Donald Trump hoovering up newly minted incels. :o)