did this guy make one map or not? one entire map? what was his actual job title in the company?
He was involved in the process of building multiple maps for Advanced Warfare. This might surprise you, but a developer working on AAA titles will have multiple people working on each aspect of the game, and they won't be working in isolation.
Quite obvious you don't like the guy and that's fine, but suggesting that he's clueless when it comes to aspects of the game development process is ridiculous.