What extinct culture would appear the most repulsive from a modern Western perspective?

A complete cultural extinction is not possible, there always remain traces, but some of its aspects dimishes with time.Before 15th century, West existed differently in the imagination of peoples living in Europe than it does today. I observed a cultural extinction which started happening from 1453 and changed everything till 1909, hence a complete extinction occured in 450 years and the social/individual system of that period is the most repulsive thing that a modern westerner can imagine. I have no specific name for that collective culture but it had covered the major part of human population. Below are some features

A painting by Giulio Rosati, Inspection of New Arrivals, 1858–1917, Circassian slaves.

During Ottoman Empire, around 1.25 million European man, women and children were sold as slaves and central Europe was the most favoured destination to get them.

• Theocratic rule, as a form of central government which rules multiple regions and overcome every religion and institution and keep expanding and fighting until all enemies were killed or start paying capitation tax.
• White slavery and child levy as a legal and a significant part of country’s economy, utilized as forced labour, for sex, military and entertainment.
• A belief that most dominant and respectful member of society is the man who pray, fight and work, so a single women word was taboo. The only possibility was when it exchanged with other words like mother, widow and slave.
• Corporal punishments for scholars, scientists and so-called witches by buring them alive or by premature burial.
• A belief that spirituality can’t exist without religion. Hence both were inseparably fused.
• An idea that people should not rule, so there was no concept of Nationalism, no clear geographical boundaries and flags were only be used in warfare.

Above mentioned practices/beliefs are now obsolete and almost extinct. But these facts are aspects of a culture and society that might seem creepy to modern Westerners, today, but would not necessarily seem to the people living in that culture.