[quote=@tobiax]
Unhinged around whom? I never read the entire old IC. So, there's a chunk I don't know.
[/quote]

Hazard's presence made Siggy and Zei go cuckoo in particular. Even after separating, there's still residual influence that left Zei mentally vulnerable. There are two straws that break the camel's back: Knowing who is responsible for the Kimeramon and seeing Dirk kick the bucket.