The only bar was that the president's party would lose seats.
Again, if your intention to be so fucking lazy about it, then sure...but that's just your laziness and not even reflective of the dynamic of this election.
Because if the Democrats once again dominate the aggregate House vote, that goes to prove that the only reason they lost seats was because of gerrymandering, not because of historical precedent.
You aren't even considering that.
Democrats: 45,846,105 (46.4%)
Republicans: 51,415,367 (52.1%)
From where did you get these numbers? They're not complete because all votes haven't been counted, and I can't find any reference to them anywhere in a Google search.
So you're doing that lazy Flash thing where you jump to conclusions because doing the work is too annoying or hard.