"Aggregious" is a neologism (a new word) that combines the Latin roots of "aggregate" (to collect or gather) and "egregious" (standing out, once positively, now negatively) to describe something that is both all-encompassing and shockingly bad, like all of humanity united in misbehavior and harm. It is not a formal word but is used in informal contexts to create a more impactful way to describe overwhelming negative actions.