The funny thing with Eva is that it's clear she hates herself as much as anyone meeting her does. It's a very sad thing to be compelled into making terrible decisions and saying the most hurtful things before you can realize it, and not having the strength to do otherwise.
Look Tenma for example, his reaction when Eva kicked the nice picnic he made. Who does that? I would have been so mad and dumped the ingratful bitch on the spot if she can't appreciate nice and simple things. Exactly what Eva would have done too with the positions reversed.
On the chapter, I really hope Urasawa won't have Roberto kill her. At this point, it's getting a bit repetitive to have any progress hindered by simply killing the witnesses or investigators. It's time to solve the thing with all the actors present, not introduce new ones and starting over from ground zero again and again.