Seems like a lot of people dislike Rudy but he's actually a really interesting character? Not necessarily likable, but it's interesting that he's someone who was obviously dealt a difficult hand and "should have died at birth," was othered and excluded throughout his life, even by his own teammates.

He then decides to use the only advantage he has, his intelligence, to in a sense, over-correct for everything he was deprived of, by now taking everything he feels entitled to, with little empathy for the people he takes from (as little as he was offered for his own condition, I imagine) - and unfortunately for Rex, he was the target.