There are cases of creatures being naturally hunted to extinction. If the genetics can't mutate fast enough to fend off predators, the species goes extinct - that's how it goes.

But if you feel like you're specifically a weapon, does that mean you feel like you were developed by an outside source explicitly for killing? I don't think most species overhunt by evolution - if they run out of food sources, they die too, you know? And then the genes that prioritize over hunting die with them.

On the other hand, if you were explicitly bred or developed for those purposes...