What makes someone better than you?

The phrase I prefer to use is better AT rather than better THAN. Saying better than infers that another person is better than you as a whole. Being that everyone has their own skills, abilities, and capabilities, it's not fair to say that someone is better than someone else. You may be better at math than I am, Simone Biles is better at gymnastics than both of us. What if I were a genius, the smartest person in the world but I ended up on the news because they found bodies stored under my house because I'm also a serial killer, would that still make me better than you in your opinion? It's just impossibly too broad to use that term .