I loved how hateful they all were, the whole game was a count down till the companions started murdering each other. It probably says more about me than anything else that I like that but I think I'd been playing a lot of happy go lucky stuff at the time where everything is perfect always and everyone always gets along. But Kreia would be very proud that you had the sense to be uncomfortable around her because she was the main villain. Albeit the sort that hoped you learnt something along the way. Frankly she reminds me of Solas in some bizarre way.
She reminds me of Solas too, but I hated Kreia. I hated her obvious lying, her obvious agenda, the fact they showed her working against you in some way, undoing the things you'd done, lying and manipulating others. It made my experience of the game turn into "Is she going to betray me yet?" No? Another 10 hours of gameplay until she does? Ehhh. It made the entire game seriously drag.
I don't know about hateful, since my character and everyone else except HK-47, G0-T0, and Kreia were either max light side or very close (with the exception of Mandalore, but I even got Canderous edged into the light a bit). Everyone was pretty great, except the source of tension that was always Kreia. And you could never get rid of her. I was too light to get her to truly talk, it seems. She constantly criticized my actions and there was no way to really call her out on all her lies and manipulation. She was basically, a thorn in my side that dragged the entire game out waiting for her inevitable betrayal that I saw coming a mile away. My opinion of the whole game suffered a lot for that.
In ways, I feel like Solas is like Kreia, but done right.