First of all: I recommend you do Endwalker's healer role quest. Some of the things you've said tip me off to the fact you're gonna like it.

As to the 'really ugly'...

I'm curious where you got that implication, because I normally have a nose for that kind of thing, and I never saw that myself, nor anyone else come to that conclusion.

That said... while it isn't on racial lines, the Ascians literally have been 'snuffing out billions of lives because they are seen as lesser and of no consequence'. That's not even implied or subtext, that was literally said, in a voiced cutscene, in Shadowbringers, by Emet-Selch himself. If the fact they tried to make that character sympathetic is a problem for you (and fair enough, it was for me), you kinda have to draw the line a couple years earlier than you have.