Nah, she definitely failed. She failed as a witch, failed as a "human", failed as a sentient creature that's supposed to have a brain with functionality beyond "I wub him," and failed her lover, her kind, and ultimately herself due to her own stupidity. She lost her brain long before she lost her heart, and finally her mind.
Spare her only as much mercy as she afforded those trampled beneath her powers, powers she abused first for her lover and later for her idiotic vengeance.