Sacrifice aside, Mexica/Nahua society had a full legal system, public schools, highly valued poetry and had intellectual and philsophical traditions, and those were highly valued alongside the Arts. You had some of the best and most stringent standards for public health and clealiness on the planet at the time, as well as extremely complex hydraulic engineering. Their capital city was one of the largest cities in the world, rivaling contemporary Paris and Constantinople. So no, it was not a society solely revolving around barbaric ritual murder, and you see Conquistadors and Spanish firars in fact repeatedly praising their art, cities, government, soldiers, and society: Even they only really felt their religion was barbaric, and sacrifice WAS a major part of their religion and cosmological worldview.
Speaking of, Nahua religion actually has a decent amount in common with Christanity, ironically, in how they view suffering and self sacrifice for the good as others as important and its relationship with the gods/the universe or God/Christ, 'm going to shill my series of 20 posts about sacrifice and it's cultural context and underlying philsophy here: https://desuarchive.org/his/thread/5495687/#5510689
Bottom line, yes, human sacrifice happened, and they did it moreso then almost any other group in history. But it's still not really close to as bad as it is often said to be, especially when you consider that, on the flip side, conflicts and wars over other people's religions didn't happen in the region, so you didn't at all have the sorts of killings and wars you saw in the Old World over say Islam vs Christianity or different demmonations of each.