The Anti-Spiral definitely was not a Mary Sue, even by this logic. Only he thought he could do no wrong. Everyone else realized that he was an extremist tyrant, though, admittedly, they were a bit biased anyway. Still, his motives were, in the end, to protect the universe. This same logic can also be applied to Lord Genome in Arc II, but it was made blatantly clear that he was one of the “good guys” not long after.
Oh, btw, pay no mind to this post. It has nothing to do with the discussion whatsoever.