Not only nuts but weak willed. Here is a woman with every advantage, clearly brilliant (she was a researcher after all), strong in the Power, beautiful. Yet so fundamentally flawed that even after living for well over 200 years she hadn't been able to get over being dumped. Not to mention how poorly she must have been viewed for being unable to earn the 3rd name despite her obvious advantages.

I have to say I think the reason Graendal became my favorite Forsaken was for this quote, which really highlights what we are discussing here.

tFoH
The First Sparks Fall

"If this Rand al'Thor really is Lews Therin Telamon reborn," Graendal went on, settling herself on the man's back where he crouched on all fours, "I am surprised you haven't tried to snuggle him into your bed, Lanfear. Or would it be so easy? I seem to remember Lews Therin led you by the nose, not the other way around. Squelched your little tantrums. Sent you running to fetch his wine, in a manner of speaking." She set her own wine on the tray, held out rigidly by the sightlessly kneeling woman. "You were so obsessed with him you'd have stretched out at his feet if he said 'rug'."