I'm a little bit skeptical. If these farmed fish are that unfit, their survival rate would almost be nil. But that's perhaps an argument we can have at another time.
You're making the point that wherever there's aquaculture, wild Atlantic salmon stocks have declined. As you know in science, coincidence is not the same as cause and effect.
What kind of pathology has been done on individual wild Atlantic salmon in rivers near aquaculture pens? What exactly happens to wild fish, in your view? What does the data tell us?