I noticed that kind of stuff the whole time (decades) I was in JWdom and made notes about it. It really bothered me.
One article I remember from probably twenty or more years ago was about a bird of prey that had double eyelids (two on each eye). One of the eyelids was translucent and it allowed the bird to blink and keep its eyes moist while pursuing prey without losing sight of the prey. "Oh, what a marvel of design!" I was thinking that that indicated that animals were designed to hunt and kill, yet, JW theology says otherwise. Extreme contradiction; it just didn't (and doesn't) make sense.
Another article was about a bird who lived in a reed habitat and when on the ground in the reeds, would sway with them in the wind so as not to be noticed by predators. "Oh, what a marvel of design!" I was thinking "Why would an animal be designed with such a defense when there were no predators when it was designed?"
It's not only the offensive capabilities we see in nature that indicate that animals were "designed" to kill, but also all the vast defensive capabilities; they wouldn't be needed if there were no predators.