Everyone's saying now she should have spent more time and resources in MI/WI, and maybe? But she pretty decisively outspent Trump in FL/NC/PA/OH/IA and lost all of those.
Seems like the overall message (hammering Trump for his misogyny and intolerance) was basically ineffective, and gets my tentative vote for Biggest Strategic Fuckup.
It's not just time in the state, it's location and allocation of resources (including time). She spent a lot of time in PA, but it was mainly focused on Philly and Pittsburgh. Given how poorly Trump did with suburban voters during the primaries I don't understand why the Clinton campaign did not expand beyond major cities in those states. She made the same mistake in MI, WI, OH, etc.
I agree her message was flawed though Look at what Obama did in rust belt states for instance, media wise. Nonstop ads about Romney being opposed to the auto bailout, "let Detroit go bankrupt," Bain Capitol, etc etc. I saw those ads nonstop. Compare to Hillary, whose ads were entirely about what Trump has said about women. Nothing about Trump shipping jobs overseas, having his products made in China, flip flopping on the auto bailout, etc. This is a man who eats pizza with a fork, and no one except Obama really focused on lampooning his populist credentials.