Iron Man, Ant-Man, etc. The scenarios where the hero spends weeks or more learning to use the technology/gifts, then the villain gets his hands on it and is proficient in a matter of minutes or hours just and can match the hero in a fight really annoys me. Unfortunately it looks like Black Panther will be similar in this respect. Part of the reason I liked Spider-Man was because the Villain wasn't just another guy who got bit by a radioactive spider too.