The dark urge started well. But then, nothing much really happens after the midpoint of the story.
And then the ending was rushed to say the least. Not a single companion cares if Bhaals murders you, as you approach the end of the story it seems like at a certain point the game just assumes you know you are a Bhaalspawn without any proper build up to a reveal. This is almost, inexcusably bad...
Wow, I had a totally different experience where Jaheira and I talked a LOT about the whole Bhaalspawn thing. Like an hour or more of convo, also Minsc had a lot to say about it as well, since they both dealt with it. Volo brings you some information and if you follow the "Murder in Baldur's Gate" questline you get a ton of info about it as well.
In addition depending on who you romance - they can help you deal with the urges. Like Karlach is amazing, and watches over you to prevent you from killing Isobel after ACT 2 is complete. She actually laughs at you when you express concern that you might hurt her - and then you black out and the Dark urge takes over and you wake up hogtied in camp - with Karlach grinning at you, like "pft, you lasted about 2 seconds against me sissy Bhaalspawn"
Anyway, I imagine you just give in to the urge then you are going down the path of no friends, no info, no support and you just eventually become Bhaals puppet - Minthara seems to encourage this, Dark Shadowheart does as well. Lae'zel stays with you but she is the only one that is like "super bad idea bro" - but you end up losing a lot of info because you murdered it all.
That seems apropos to me - I have no idea how you chose to play.
