Carthaginian rule was based on cruelty, and disputes with tribes and towns were often settled by fire and crucifixion. Since Carthage’s own politics were based upon individual avarice and pursuit of economic wealth and self-interest, traits cruelly buttressed by child sacrifice to Baal and public crucifixion for criminals, the loyalty of Carthage’s citizenry never went very deep. Abroad, Carthage never took pains to gain the allegiance of its subject peoples, and their loyalty to any Carthaginian cause was always suspect. The paradox was that Carthage was heavily dependent upon these overseas areas for the recruitment of its mercenary armies, a task that was never easy…

With few exceptions, Roman allies remained loyal throughout the war despite the threats and pressures from Hannibal’s army.

Richard A. Gabriel and Donald W. Boose, Jr., The Great Battles of Antiquity: A Tactical and Strategic Guide to Great Battles That Shaped the Development of War, Westport, CT: Greenwood, p. 287

Rome wiped Carthage off the map, so we only have Roman sources and some disputed archaelogy to attest this.  Still, if it’s true, despite Hannibal’s undisputed claim to badassery, and even though I rarely take Rome’s side in a fight… good riddance.