Yep! No one can be the perfect image of goodness. Although I think it goes without saying Wyll's pact/killing Karlach and thievery is nothing compared to mass genocide XD
Same with Minthara tbh. She hates all gods for their cruelty and etc. But if you play as D. Urge she will inspire you submit to Bhaal and become his full puppet. Moreover she will persuade you if you tell her that you don't want to become chosen of Bhaal. Before that you could hear dialogue with her about Orin that she will murder and slaughter this world instead of rule over it and how this is bad. But when you will do the same - it completely satisfies her. Poor writing in act 3 as I see.
Minthara hates the gods for being fickle, not for their cruelty, but she also
admires the gods. In the EDIT: love Dryad test, you gain approval for suggesting she admires them the most (even if it's wrong, because she admires you the
most). I don't think it's bad writing tbh, in her case at least. She doesn't suggest you to be Bhaal's puppet, just to embrace your birthright and take the power for yourself - which is in line in what she believes in: power is everything.