Well one good thing about Bounts, like what that snake dude said is that they're independent loners. So not only they fight individually but also they're not 100% loyal to heir leader.
That Maki dude who was once from the 11th squad bears a grudge against Kenpachi because he became the new leader of the squad after defeating its former leader. So Kenpachi > the old leader > the shinigami dude. But Ichigo defeated Kenpachi in their fight so it makes sense if Ichigo can swoop his ass in one go. right?