Historically, the party not in control of the Oval Office makes substantial gains in the first midterm election. This year, the Republicans will have made minimal gains in the House and will lose seat(s) the Senate. This is a very poor showing compared to other midterm elections. Is that simple enough for you? Please try not to be blinded by your zealotry.
Ok so by winning the House, the GOP actually lost the House. Intriguing logic.