I mean, I would agree with the people saying "Keep her for the evil players" if she wasn't a good character whose best storyline is one of redemption.

That's what made no sense to me as Durge. I kept her alive (although I didn't participate in the massacre, just let it take place), and when she joins you, you discover her evil behaviour was purely down to being controlled by the Absolute, and that she's actually an exception from the usual Drow in that she's seeking to defend and avenge the helpless.

Look, the Durge and Evil storylines are so under-developed, edgelordy and unrewarding, I eventually just gave up on that playthrough.
There was nothing to keep me playing, nothing compelling me to explore the evil side of the game. And in fact, the playthrough was going to be significantly shorter, as all the quests you get in the "good" playthrough aren't replaced by evil alternatives.
Larian seriously need to take a look at Tyranny for a great example of how "Evil" should play out.

Just to reiterate, I love this game. I've played nothing else since release, and it's my favourite new game in years. Therefore, I'm criticising it to make it better.