Win-loss records?! You realize that's tantamount to placing them based almost solely upon plot devices, yes? Fights rarely are drawn to placate vs. forum junkies. They're to further the story. Also, trying to draw up accurate records would be next to impossible for most characters. Feats are still our best, and near-only gauge, for characters.
Also, are you expecting them to have more losses because they're villains? If anything, they have more wins. Usually a story arc is peppered with the villain winning until the final battle.