I think I generally I understand our constitutional republic and the idea behind the electoral college. I also think understanding those things facilitates understanding how we could have one Party in power when more people actually prefer the other Party. It's obviously very possible to have the majority of the people in the country overall want and even vote for Senators and Congressmen of one Party and have the other Party end up in control of both Houses of Congress.
It's especially easy for that to happen with the Senate because each State gets two Senators regardless of population.
Scenarios in which it could happen with the House are more complicated but obviously there. In fact you can see the potential in those poll results I cited. The Democrats have a fairly solid 8 point edge overall. But their support is concentrated in Districts that Hillary Clinton won by at least 10 points. They have a 36 percentage point edge in those Districts. That's a lot bigger than the edge Republicans have in Districts Trump won by 10 or more points. That edge is 12 percentage points. And the big one is Republicans having a 13 percentage point edge in what the pollsters designate as "swing" districts.
Given those numbers a scenario in which Democrats could have a solid edge in the overall combined vote while Republicans end up with more seats is VERY plausible.
During the 2016 election more people voted for the Democrat Presidential candidate than voted for the Republican candidate and more people voted for Democrat Senate candidates than Republican Senate candidates. But guess which Party controls the Presidency and the Senate. We all know Donald Trump got a lower percentage of the popular vote than Mitt Romney did but he's President. And the Democrats got 51 million votes in Senate races to the Republicans' 40 million but the Republicans won 22 Senate Races to the Democrats' 12.
It didn't quite happen in the House but one can still see how the overall vote results can differ from the "control" results. Republicans had a 1.1 percentage point edge in the overall combined vote but they ended up with a 5.7 percentage point edge in terms of House seats.
Bottom line is that if control of government was proportional to how people voted overall in the 2016 election Hillary Clinton would be President, the Democrats would control the Senate, and the Republican edge in the House would be smaller than it is now. The fact that the Republicans are in control right now should not be construed as meaning that "The People" prefer the Republican Party.