Majority of dems still voted dems and majority of repubs still voted repubs.

There were some Angry Bernie people who did not vote.
There were some anti hillary (not bernie related) who did not vote.
Trump gave representation to KKK and got their small vote.
Anti establishment crowd rather voted Trump than Hillary. They would have rather voted Bernie.
Anti women - evangelical christians voted Trump.

These were all small segments of voters but you put them together and it was enough to defeat Hilary.