Feel free :-) I have no real business in convincing you. Those banks are not privately controlled, but you are right that all use debt instruments. Debt instruments are as old as money so there is nothing strange about banks using them. And debt instruments are also used by those other central banks you have mentioned including those you list as "left standing". In Iran due to religious issues they do not circulate interest bearing instruments but have their own solutions in place (like for example bankers drafts which are credit instrument). I will leave aside the problem, that North Korea has something which only pretends to be a monetary system. But even they issued internal bonds and many of them were issued since early 1950-ies although I am not surprised that you have never heard about them. But be assured that they do exist. Below there is an example of something which you say doesn't exist:
It may not be strange and that's not the point, the point is fiat currency is a Ponzi scheme designed to enrich elites and strip the common man of his wealth.
I am not to happy about fiat currencies either but the point is that incorrect information is being circulated and this fact doesn't add credibility to such theories.