Livre d'Or

I expect characters who are presented as "good guys" to have some moral complexity,

I think it's natural that Angel has some flaws, whereas Angelus is mostly evil, and the series is right to *try* to do this. But I agree it doesn't work as well as it's intended to.

I think the trouble is with flaws the series creators didn't really think about, that they can be massively out of proportion. Like, if the character does thing X, which the series creators think is neutral or good, but I think is gross and disgusting and awful and ruins any sympathy I ever had for the character, they do X at random intervals completely unrelated to their other character growth. And then you either treat as if they're a real person who ignores all your rants about how X is wrong, and say "even if they're good otherwise, I can never trust them" or say "X is an aberration, the character isn't REALLY like that, even if they do that in the show", and neither of those is really satisfactory.