No-one will ever know if there was a more electable candidate.
She beat Trump by 2%, or ~3 million votes. It is however unfortunate she did not win enough of them in a handful of the right places. And given that it's estimated Comey wiped 3% (~4 million votes) off her support with that late investigation reopening, really, bar that freakishly cack-handed intervention she had done enough to win.
I can certainly see how that would seem to be the case.
You know, as long as you ignore the year's worth of polling data consistently showing her one of the weaker candidates against generic Republican candidates, specific candidates, and Trump himself of the entire 2016 field. And the decades' worth of polling data consistently showing her as one of the most disliked and most distrusted national Democratic politicians. And the legacy of her husband's administration, the policies she endorsed and advocated during it, her time as Senator, her Senate record, and her time as Secretary of State under Obama. And lingering resentment towards her after her shenanigans during the 2008 race. And that Republicans had been planning for her candidacy for a decade even prior to 2008.
But yes, I can certainly see how so long as one uses a narrative entirely divorced from fact, one might come to a conclusion Hillary was indeed the strongest candidate in 2016. Any narrative of the 2016 election not centered on the names "Hillary Clinton", "Robby Mook", and "John Podesta" is counter-factual, let alone those which put names like "James Comey" or "Vladimir Putin" before them.
Of course, she did not merely lose in "a handful of the right places". Trump swept the swing states, and he did so because his campaign outspent and had superior ground games in them, while Clinton was jetsetting across safe blue states insulting voters. It's rather convenient the votes Comey supposedly "wiped off her support" so neatly match polls' margins of error, or at least the margin of error typically considered acceptable for polling results to be considered valid, does it not? Or, that somehow lost in the shuffle, the "Comey letter's" impact at best was to negate the polling swing enjoyed by Clinton after the release of the Access Hollywood tapes?
It rather strikes me the real question, and the one Democrats have fought to the eyeteeth to avoid for the past four years, is why was Clinton so vulnerable in them to begin with. The truth of the matter is Trump's margin of victory in several swing states was so small, the outcome might otherwise have been decided by the weather. At least the impact on inclement weather on election turnout is actually a well-studied phenomenon, and is backed more strongly by evidence than Comey in any way influenced the 2016 election's outcome. It's no small surprise Clinton and her former campaign "staffers" have yet to actually latch onto that as another link in a chain of excuses for their own stark raving incompetence, save for that weather on election day across the country was
favorable to Democrats.
The problem is that this is kind of a zero sum game. With the way our voting system works either democrats win or republicans do, there is no third party big enough to change that. So it really does come down to if you want 4 more years of trump or not, there isn't another choice.
One wonders why I might have said it's a prisoner's dilemma, not a zero-sum game. One wonders indeed...