If this level of ruthlessness were defined on an x,y,z graph as - Right, Authoritarian, Corrupt (maybe add Nationalist dimension too) then I think there are, very lamentably, no shortage of historical examples of Left, Authoritarian, Corrupt governments.
I *am* thankful for a collection of many examples of Left, egalitarian, ethical models for organizing how we live together, and am currently reading, in a book co-edited by... :fediverse: ❤️