It’s a strawman if it’s presented as “the argument of that side”, yes.

While I agree that pits have the capability to fuck your shit up 6 ways before you can blink, and along with breeds like the Pug should just be allowed to die off with the current generation, you are using a common tactic of “I’ll use the best argument to represent my side, and the worst argument to represent their side so it’s clear my side is superior” as a generalization for the entire opposing viewpoint.

Straw men blow away in strong winds. Build better arguments, you’ll make better points.