It’s fair to point out that Hillary Clinton won the popular vote by roughly 1.5 million votes. It is also relevant, however, that California went to Clinton by almost 3 million votes.
The campaigns were necessarily planned and executed around the reality of the Electoral College dictating the winner, which means Donald Trump’s campaign wisely didn’t waste many resources in the State that accounts for ~2X Clinton’s margin of victory in the pop vote. It also means that many people felt safe not voting for HRC in California and opted for a protest vote, instead. So, really, we have no idea how much or what way the EC skews the popular vote.
The fact that so many people voted for HRC is still relevant, but “Hillary won the popular vote!” is not the profound statement many want it to be.