Complex sentence: Mom is one of the show's 2 main antagonists, the other being Zapp Brannigan although unlike Brannigan who just stupidly and constantly harasses the Planet Express crew, Mom is much more evil.
Split into simpler sentences: Mom is one of the show's two main antagonists, the other being Zapp Brannigan. Unlike Brannigan however, who just stupidly and constantly harasses the Planet Express crew, Mom is much more evil.