Carlos won cleanly. Ring outs are fair game. The fact that people keep obsessing over it is just shameful. Same as all the people who kept hating hard on Rei no matter what. Oof. Obsessed.
No problem with the poison toe either. It was made a big deal of even in part 1 that it’s the opponent’s fault for not catching it. As for whether or not it’s a known variable in Purgatory Matches, the Mongolian guy was aware of it at least. So possibly an open secret or one that Purgatory chooses not do anything about because it’s a “part” of his body, same as Hanafusa’s bone blades that Metsudo allowed for to make fights interesting. Toyoda is likely the same way.
Much like how Hanafusa wasn’t so much a “fighter” as he was an assassin, Ninjaboo here is the same way. He’s a perfectly fine fighter; definitely more skilled than Rihito. He chose to be a ninja, including everything that entails, and adopts those traits as much as he can in Purgatory’s format that doesn’t allow for killing.