“suicidally dysfunctional”
Yup!
“doomed to extinction”
Unfortunately, no!
They’ll be breeding on your tax dollars.
There’s the problem. They’re only doomed to extinction if it remains a closed system. If you let them out of the cage before the experiment reaches its terminal stage, you’ve effectively released psychotic dysfunctional super-predator rats into a larger population that’s not prepared to deal with them. The result is like... well, take Dearborn or Minneapolis. Please.