Really? That's weird because contrary to the beliefs of a lot of stupid people out there Hillary Clinton was actually a Moderate. But because she was a moderate who was willing to consider all sides of an issue and work for mutual agreement she got accused of being a two-faced liar even when she told the truth. Meanwhile, Donald Trump was anything but moderate, and despite being the single most dishonest presidential candidate in known American History he was still perceived by many moderate independents as a straight-shooting candidate who told it like it is.
I think you might be surprised to find out that a lot of so-called "Independents" aren't particularly independent. Keep in mind Bernie Sanders technically registers as an "Independent." The sad reality is that there are a lot of voters in this country who really don't vote based on policy positions whatsoever. They vote for the candidate they'd like to have a beer with. Projecting confidence, bravado, and charisma are likely far more important than her moderate views.
The only president I would love to have a beer with is Bill Clinton. Yes, our presidential elections are basically beauty contests. With the exception of 2016, the candidate who had the higher favorable rating has won. 2016 set records low or the lowest favorable ratings of any candidates since Gallup began keeping records of it. Trump at 36%, Hillary at 38% now hold the lowest or bottom two slots. Goldwater back in 1964 at 43% had been the lowest until 2016. Charisma also has a lot to do with who wins. Hillary's ho hum campaign and coming across as aloof and elitist along with a personality of a wet mop didn't help her.
Look at past election, charisma, Obama had it, McCain and Romney didn't. Obama won twice. G.W. Bush didn't have much charisma, but he was more down homey than the statues Gore and Kerry, he won twice. Bill Clinton had charisma up the ying yang, he won two fairly easily. 1988 was an election between two drab candidate in G.H.W. Bush and Dukakis. Reagan also had charisma by the bucket full. Carter and Mondale didn't stand a chance.
Now let's look at the favorable ratings.
1976 Carter 63%, Ford 58% Carter won
1980 Carter 54%, Reagan 59% Reagan won
1984 Mondale 54%, Reagan 61% Reagan won
1988 Dukakis 50%, Bush 53% Bush won
1992 Clinton 51%, Bush 46% Clinton won
1996 Clinton 56%, Dole 51% Clinton won
2000 Gore 55%, Bush 58% Bush won
2004 Kerry51%, Bush 52% Bush won
2008 Obama 58%, McCain 55% Obama won
2012 Obama 57%, Romney 51% Obama won
2016 H. Clinton 38%, Trump 36% Trump won, this is the only exception since 1956 where the presidential candidate that won didn't have the higher favorable number.
You should not that only 4 major party presidential candidates ever had a favorable rating of below 50%. G.H.W Bush in 1992, 46%, Goldwater 43% 1964, H. Clinton 38% 2016, Trump 36% 2016.