The "Madam President" mentality of her supporters was, IMO, a key factor in males being strongly against her. She ran a campaign that perpetually preached in condescending tones about "our daughters" (as if our sons don't count), "the condition of women and girls around the world" blaming men for the problems women face (but not Muslim misongynists; that would offend part of "the base") as if men weren't watching. But they were.
How many men (and mothers of boys for that matter) noted Hillary's constant emphasis on women and girls? Is the condition of our boys so great these days? How many men struggling to make ends meet because of child support payments that are set by an arbitrary formula who would work a second job to make those payments if it wouldn't result in being taken back to court and having the support amount raised, got psyched by Hillary's "This Is My Fight Song! ad? Did they feel better about it when they attempted to enjoy court-ordered visitation with their child(ren) only to be denied by their child's mother and authorities doing nothing to enforce it? There are a LOT of men in this situation, and whether they are victims or volunteers isn't the point. Hillary rubbed the gender card in THEIR face and thought it wouldn't affect her vote total. (And, yes, some divorced men do, very much, have lawyered-up vindictive exes, and many of them vote.)
"Stronger Together" wasn't meant for all of America. Just Feminists, minorities, environmentalists, BLM supporters, and the various genres of leftists who make up the "progressive" movement. Who it DIDN'T include came back to haunt Hillary. That's what you get for not thinking.