We're not discussing the Garleans right now, but if someone were to say "the Garleans are Nazis" to mean their society is just like 1930s-40s Germany - I would also disagree with that. Though if they just meant it as shorthand "they are a bunch of goosestepping bad guys" I wouldn't really care. Why do you feel the need to constantly bring up discussions I was not even a part of in your responses to me?

The issue is that Venat is very clearly described now as 'being just like an ancient' - she makes unilateral decisions about the fate of the world and the future in it because she thinks she knows best. If that is mental illness, then the entire society of ancients is mentally ill, because they all do that. At least Venat planned to actually step aside for future generations.

(Also if you just mean "Venat is mentally ill" as shorthand for "she is a bad person that I don't like" then that's kind of offensive to actually mentally ill people.)