I am going to say something that not a ton of people will agree with, but I’m fine with that.
Whew...ok, here goes...
Ok, ok, she may be the leader of the Order of Mata Nui, but think about it. She gave up the idea of a Toa team, and created an organization in secret, and actually went so far as to bar entry to other Toa. She has no opposition to killing her enemies, and even if she doesn’t do it herself, her underlings are more than happy to oblige. She also knew about the betrayal of the Makuta, and failed to take more desperate measures to prevent the fall of the Great Spirit. She is also known as a secretive person, and keeps secrets from her closest allies.
So....yeah, she wasn’t a great Toa, maybe if she wasn’t a Toa it would be fine, but as a Toa, her behavior is largely frowned upon.