There are four reasons Hilary Clinton lost, in descending order:
1) The republican party disenfranchising c. ten million US citizens.
2) James Comey and the "butheremails!" October surprise he ran on behalf of his party colleague Trump.
3) Russia's various meddling.
4) Hilary Clinton running a very bad and lacklustre campaign, and realising too late that she needed to be more than not-Trump.
You missed the most important one - 62,984,828 Deplorables. They
knew what Trump was, but voted for him anyway.
But yes, Hillary was a terrible candidate. We know this because the Deplorables kept telling us so. Would they lie to us? Of course not. And it's not like it was out of the blue. They've been trying to tell us for
decades how bad Hillary is! So we took it on board and said "Hillary is a terrible candidate, but she's not Trump so I guess I will have to vote for her" (except for those of us who didn't).
Let's count the ways Hillary was so terrible, and what she should have done to be more than not-Trump:-
1. Being a woman. Hillary should have taken testosterone and gotten a sex change.
2. Cozying up to elites instead of listening to common folk. She should have avoided anyone with power and influence, and lived under a bridge with homeless people.
3. Not being progressive. She should have offered
real change, like Obama!
4. Being part of the 'Establishment'. Hillary should have remained independent from the Democratic party all those years. When challenged she could have said 'of course I am a Democrat' but continue running as an independent.
There are many more things she could have done of course, such as conceding to Bernie in the primaries even though she won, or simply giving up politics to let men run things, but sadly she chose her own aspirations over what was best for the country. What made her think she was better suited to the job than a failed businessman, grifter and reality TV star?
And the weightings I'd give all those would be 70-20-7-3.
I agree with those weightings. But even though her lackluster campaign was only a small part of it, in the end she was totally to blame for the loss. If only she had whipped up a bit more enthusiasm we could have won! Many of us loyal democrats worked very hard to get people on our side, only to be let down by that 3% (especially those of us who didn't bother voting because she had an 'unassailable' 3% lead in the polls).