The Super God Spirit mode and Wan'er's power were like water and fire. Water could put out fire, and fire could burn water. If there was the same amount, they would put each other out. It was like when Han Sen and Wan'er were together, their powers were suppressed.
After two Wan'ers combined into one, her power exploded. She was much better than Han Sen with his Super God Spirit mode. That was why the scales were now tipped.
In a situation like this, they were restricting each other. If one of their powers was stronger than the other, there would have been a big restriction. Now, Wan'er's power was twice as strong. It made Han Sen's Super God Spirit mode useless. He was suppressed because of that.
Fortunately, Han Sen did not rely on only one power. Although his Super God Spirit mode was suppressed, he still had four other geno powers.