The MCU Villain Problem (Part 1)

They say a hero is only as good as the villain he takes down. Well, in Marvel's case, the heroes might be in trouble. This is the first part of a deep dive where we try to explain where Marvel went wrong. If it seems like I rushed through a few sections, worry not, because that either means a certain villain wasn't too problematic or I will circle back and talk about them again later on.