Kicking off a whole lot there, fella! The question is: exactly what is "criminality"?
Sure, murder, rape and all manner of similar "crimes" against humanity. Strangely, there's never been a law against adultery. In the same vein, the "sin" of homosexuality only became a "sin" in comparatively recent times. Why is that? That's just to be going on with.
Criminality isn't overly hard to define, at least in general terms.
Where there is established common or statute law, contravening the law is classed as criminal. You've admitted to purchasing and having in your possession Class A drugs and to supplying them in the past, you are a self confessed criminal irrespective of whether you respect the law or not.
In purchasing illegal Class A drugs you have willingly condoned the criminal actions of those in the supply chain and it's hardly a mystery that those actions are frequently highly damaging to society.
Will that do? It's not exactly complicated.