The Marvel Cinematic Universe is the highest-grossing franchise in the history of motion pictures., and its success is hard-earned; after all, it takes a lot of quality and entertaining films in order to bring that many people out to theaters. For a time before the modern-day hit-or-miss quality, it felt like the crew over at Marvel Studios could do no wrong. But no film or franchise is perfect; everyone has their flaws, and the Marvel Cinematic Universe is no exception.