People just don't know how to train pitbulls. I have raised 7 pitbulls over the years and they have been the most well behaved dogs. The trick is when they start growing up you have to establish dominance. I wrestle with them constantly as they grow, and the very moment they start to get rough, I pin them to the ground. The next part some people claim is "abuse" but those are the people that raise pitbulls that eat the neighborhood children, but anyways I pin them to the ground, head first so their rear end is in the air, this is a submissive position. I then insert the tip of my penis into the dog's asshole. Just the tip, this isn't a sexual thing, it's a dominance thing. I still cum but that isn't the point. Once that's done there is an immediate change in the pitbull's behavior. A pitbull isn't the problem, the problem is a pitbull that thinks it's an alpha. But since bottom bitches can't be alphas this completely circumvents that problem.
I've repeated the procedure a few times on especially strong willed pitbulls, but I've never had to more than three times on a single dog.