I’ve heard of its cities of marble and gold with no people in sight. I’ve also heard of a megalomanic leader.
It sounds as a very weird but interesting place to visit as a tourist. Less appealing for those who have to live under the oppression though.
By definition an antihero is a hero with a lack of heroic attributes. What we understand as heroic attributes keeps changing however. Sometimes it’s a lack of virtues, sometimes it’s generally a wrong motivation (like being the hero merely for profit). I’ve also seen antihero instances that described a tragic hero, who challenged the status quo and ultimately failed, where it could be understood that protecting the status quo and always winning is a heroic attribute.
All in all the term is as diluted as what we perceive as heroic. In the literal and dramaturgical sense.
Just don’t make the mistake and describe villains as antiheroes.