His supporters forced their way into the Capitol Building in order to keep him in office by throwing out the election results.

If that ain't an attempted coup, then what is?

I mean... The proud boys aren't far off of from being Trump's private army. And he did give them the marching orders to head into the capital building. Sure they don't have tanks but I think the comparison still holds. In fact, I would argue they were closer to success than Wagner was.

While he didnt have a private army, he had hordes of angry armed people that he pointed toward the capital. He knew he lost the election and was trying to steal it with fake electors and the storming of the capital. While it's not the same situation, he definitely DID try to overthrow the government and he IS still walking free.

Was that the point of my comparison, or was it simply to illustrate that politics is weird and the hand of justice slow?

There are many explanations for why Prigozhin is still free that aren't "the entire thing was fiction." The OP contains one, in fact, which is that Putin is hedged in by his own system of cronyism.