Yes, all your companions except Astarion will hate you.
I don't understand how we're supposed to run an evil campaign if that's the case. When playing an evil character it would be interesting to explore options like accepting Raphael's offer (which only Astarion and surprisingly Gale approve of) or use the tadpole. Getting disapproval hinders that.
Also, you have to choose Astarion, Shadowheart, and Lae'zel for an evil campaign, but Shadowheart and Lae'zel clash all the time. It's interesting to watch, but if they won't learn to get along it will be a problem. There are supposed to be more characters in the full game so maybe we'll be able to pick party members that won't antagonize each other.
