Yup, reigning PAC-12 Defensive Player of the Year plays "atrocious" and "awful" defense. I don't know what tell you, bud, but even
Texas's own highlight real doesn't seem to support your version: the two shots they showed of Harmon scoring, Jordan Hamilton was guarding her on the first one (at 0:07), and Lexie Hull on the second (at 0:31). So at least 1/4 of her scoring came at the hands of other Stanford defenders. Meanwhile, the highlight reel shows Wilson guarding
Matharu at 0:34.
Harmon had a great game, all credit to her. And it's definitely easier to do so when there's almost no tape to scout her on - it was, as you note, her second college game.
But I don't know why you want to bash Wilson as if she was the sole reason we lost.