I think your description of evil more likely toward neutral, not the dark evil.
and I suggest the game should unlock the true end for both the neutral route and the good route in specific conditions.
the evil route in BG3 is obvious for corrupting everything, the player character once chooses this way that means fail the trial from the God of the gods AO-- a destiny candidate fails his/her destiny trial.
and I agree your argument, you supplement the words that I haven't organized, that is also I want to express
