she was certainly not likeable, no one can argue with that. Her campaign was not good either, it was horribly complacent. But let's not kid ourselves, Trump wasn't exactly beloved either, and she would have held on but for Comey. I won't even talk about how some of the anti-Catholic stuff from Wikileaks damaged her in the mid-West. But... and I'm not actually singling out the NYT.. there was an excessive focus on her emails by the media ( a lot of research on this after the fact, great scholarship, if I remember the book title I'll post it). And then on top of that Wikileaks comes along and what's it about? Hacked emails. Nothing huge in it, but just enough to pad the narrative of a secretive elitist which was exactly what the electorate didn't want in that moment. That was bad enough... and she seemed to be hanging on, and then wham! Comey in the last 10 days was fatal. She had the disadvantage of incumbency in a change moment, but was still so obviously more competent than her opponent, but there it was emails again. And she was done. It's worth bearing in mind that the woman left her role as Secretary of State with sky high polling. But the GOP (and I say this with grudging admiration) are masters of constructing a negative narrative against potential opponents. Interestingly the whole Hunter Biden thing failed this time, but it was part of the same strategy. This is not controversial, such luminaries as Kevin McCarthy worked hard to damage her "Everybody thought Hillary Clinton was unbeatable, right? But we put together a Benghazi special committee, a select committee. What are her numbers today? Her numbers are dropping. Why? Because she's untrustable. But no one would have known any of that had happened, had we not fought."
We can try to simplify her defeat if we want to, but a lot went into it