She wanted him ruthless and deadly but did she want him this unnecessarily unstable? He's wasting his time and energy chasing some random lady in order to get her to stab him in the face. That doesn't sound like something Maria would approve of.
@TheGoodFella No she literally can't. She has a concrete reputation as a man-hating bitch that uses and abuses her power as granddaughter of the School's owner to get anyone she dislikes kicked out of the school. So no she cannot do better.