Yes, Clinton won the popular vote, but she certainly didn’t win the election. And that was largely because of the systemic bias, which favors the more racist, sexist elements of this country.
And Obama had to be the perfect candidate to win. A family man, no skeletons in his closet whatsoever, with a charisma the political world hasn’t seen since JFK. And his election brought those awful elements of our society to the fore, and touched off a fascist revolution that is still going on today, which the leader of won the presidency on the back of and is in danger of winning it again.
This country does have a lot of racism and sexism. More than most would like to admit, including you, it seems. And Kamala Harris isn’t a strong enough candidate to overcome that, especially when you combine it with the other factors of having to unite a fractured party, coming into the race late, and being chosen at the convention rather than through the primary process.