You know, Hillary was never my favorite candidate, but I never bought into this argument, either.
Hillary defeated Trump by 3 million votes. Period. We can't help it if the electoral college is horse****.
And the simple fact is that none of the accusations against Hillary over the past 30 years ever had any merit. That is just a fact. The right wing spin machine did its job destroying her reputation. She made a serious mistake with the email server, but it was not malicious in nature. That definitely can't be said about Trump.
The thing is one can't defend things Hillary had direct control over. Did you know from 1 Sep 2016 through 8 Nov 2016 Hillary had 71 campaign visits/stops/appearances to Trump's 116. That is basically ceding the campaign trail to Trump. Her 71 visits looks higher than it actually was as it included fund raisers in deep blue California and New York. In the deciding states, Wisconsin, 5 visits for Trump, zero, none for Hillary. Michigan, six for Trump, one for Hillary. Pennsylvania was closer, 8 for Trump vs. 5 for Hillary. Even in electoral vote rich Florida, Hillary basically ceded that state to Trump with 8 visits for her, 13 for Trump. Trump outworked and out campaigned her by a fairly large margin.
You also had Hillary's inept campaign strategy, if you call gaining more electoral votes than Obama did a strategy. She spent way too much time, energy and money trying to win Arizona, Georgia and Utah instead of paying attention to her own backyard, the so called blue wall states. Trump's campaign and his supporters, although smaller was filled with energy, enthusiasm, to where they were willing to go to the four corners of the earth for him. Hillary's was more ho hum and lacked for the most part enthusiasm. The Democrats had a 6 point advantage in party affiliation/identification in November of 2016, but only a 3 point advantage among those who actually voted. Hillary's ho humness couldn't even entice a lot of Democrats to get out and vote for her. Maybe they took her election for granted, as being in the bag. It seems Hillary certainly did. She'd be sitting in the White House now if she had given the election the old college try instead of a half hearted one.
Then you had the jury rigging of the Democratic primaries by the DNC and democratic state party leadership in Hillary's favor. That made a lot of Sanders supporters to stay home. Those that did vote went to Hillary 75%, 12% for Trump, 13% third party. Compare those numbers to the Democratic base which voted for Hillary 89% to 8% over Trump with just 3% voting third party. In the end, the independent voter gave the election to Trump. Why? Hillary had a 27% favorable rating among independents, 70% unfavorable. Trump wasn't much like either, but his 40% favorable/57% unfavorable on election day was just enough to give Trump the seat in the Oval Office. Questions 10 and 11.
https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/l37rosbwjp/econTabReport_lv.pdf
Heck, 25% of all Americans disliked both major party candidates and didn't want neither one to become the next president which included 54% of independents.
One in Four Americans Dislike Both Presidential Candidates
There's numerous other reasons, but this just touches on the most obvious. Still, as you pointed out, the earth, moon, sun, the planets, even galaxies had to align up perfectly for Trump to win. This is why I believe any other Democratic candidate would have won hands down.
Shame the Democrats didn't listen to America as a whole, back in February of 2016 a poll showed 56% of all Americans wanted the Democrats to nominate someone other than Hillary. Of course all of America do not decide who will be the Democratic nominee, Democrats do which is their right, no doubt about it. But is is all Americans who decide the general election. Not just democrats who could jury rig their primaries to ensure Hillary won. No such jury rigging the general election.
