The popular vote should and does matter. The idea of the electoral college goes back to the original idea of the Presidential election, which is that the states vote for their senators and representatives, and they vote for president. But then it was decided that they didn't want congress voting in the president, so they changed it to a different group, but has the same number of voters, by state.
Back then, the popular vote was largely a myth. You had to be a land owning male to vote. Only 6% of Americans were eligible to vote when George Washington was elected. But we have since embraced the idea that everyone should have the right to vote, and that change is based in the fundamental belief that all people are created equal. This is also why there has been a movement in many states to allow felons who have completed their time to be allowed to vote again. Because voting is a fundamental American right.
So if this is the case, as every American has an equal right to vote, doesn't it make sense that everyone's vote should count the same? But with the electoral college, they do not. It was never changed, however, not because it was "better", but because the popular vote and the electoral college always went the same way, at least since 1888, and in every election where women and minorities had the right to vote, which was a result of the movement toward universal suffrage. As long as the winner of the popular vote won the electoral college, it didn't matter, it was still the will of the people, regardless of what that outmoded relic said. But that all changed in 2000, and now we see that it could happen regularly. Since now we have twice had the election stolen from the people, the time has come to end it, before it can happen again.