We know the general opinion is
"we wasted our time by SLOWLY corrupting Ciri and now she suddenly is entirely broken!" and for how wrong, or confusing, or shocking this design choice may have felt like, I'm glad to notice you're exactly where we wanted you -especially in terms of emotional spikes- as that is
exactly the kind of reaction we wanted to trigger
.
Those who are familiar with the books know we couldn't skip this part, and we tried to deliver our take on arguably the darkest part of the entire lore.
So is Ciri actually broken? Well, just follow
Malata example and have faith: Chapter 4 will clarify where you
actually are with Ciri's corruption.