I know you were.
Here and elsewhere, you seem OK with making a technique look good, rather than letting the technique speak for itself. And I don't agree with any kind of faking. Slowing the technique at the point of most pain to allow going into the flow may be necessary to prevent injury. But techniques imho should only be done on people who know the technique and therefore can recognize it and react to it.
As to the bolded parts, that has not been true in my experience. Properly applied, the technique will look real, and underacting is only going to increase their pain if they don't go with the flow of the technique. That doesn't mean a properly applied technique won't hurt. But we don't want to dislocate a joint just to prove the demonstration of a technique that will do so. I don't call that being fake. Maybe that is what you were trying to say, but it just didn't come over to me that way.
You are fortunate. I have done more than "some" Hapkido, and although I know a fair amount of techniques (nowhere all of course) I still see techniques that I have to play over and over to be sure I can see what is being done.