You refer to the 2016 Presidential election, I assume? Because the election is not about who gets the most popular votes. It is, and always has been about getting the most electoral votes. Something every candidate for the past 200+ years has been well aware of. If it were about the most popular votes, candidates would go for the most popular votes. in 2016 only one candidate concentrated on winning the most popular votes-Hillary Clinton. She assumed she would win the electoral vote so decided to run up her margin of victory in states she couldn't possibly lose-California, New York, and Illinois. And it worked, to an extent. She ran up huge margins in those three states. But she neglected the main goal-to get 270 electoral votes. She lost in states she could have won had she spent more effort there. Trump, on the other hand, spent little time trying to win those three states. He concentrated on the ones that were up for grabs, and won most of them. In the process, he won an electoral landslide.
So blame the "unfair system" if you want, but you will be placing the blame in the wrong place. Blame Hillary. Because if she had 5 million fewer votes in California, Illinois, and New York but picked up one million in battleground states she could have won, she could be the president right now. But she isn't-because of her own tactics. She could have been the one getting fewer popular votes and winning the election. Then all the crying would have been tears of joy. Maybe it's a consolation to her that she won 6.5 million votes in three states the Trump campaign didn't try to win. But she still lost by the rules. She had to accept that, her supporters should have also.