Hillary's problem was her only goal was to achieve more electoral votes than Obama if one wants to call that a campaign strategy. She wasted time, energy and money trying to win Georgia, Arizona and Utah to achieve that goal ignoring her own backyard, the so called blue wall states.

And yes, she ignored Bill's advice totally. Top that with being lazy and ceding the campaign trail to Trump, she lost. Hillary made 71 campaign appearances, visits, rallies to Trump's 116 from 1 Sep through 8 Nov 2016. In Wisconsin, it was Trump 5 visits, stops to Hillary's none. Michigan, Trump six, Hillary one. Pennsylvania was closer, 8 for Trump, 5 for Hillary. She even ceded electoral vote rich Florida to Trump, 13 visits, stops, rallies for Trump, 8 for Hillary.

I'm sure Biden won't make those same mistakes. Especially ceding the campaign trail. If he does, then like Hillary, he deserves to lose.
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It's high past time that we start electing Americans to congress and the presidency who put America first instead of their political party. For way too long we have been electing Republicans and Democrats who happen to be Americans instead of Americans who happen to be Republicans and Democrats.