IMO, it's an all-too-common mistake to look at our QB woes from the perspective of Brady, and the Evil Lord who coaches him. I truly wish that I could respect those two, being the GOATs that they are. Were they not such cheating scum...
Also, I don't believe that anyone who knew what they were talking labeled Goff a bust. His rookie season was abysmal. But, his issues were more on Fisher, and his mishandling of his team than Goff being a bust. And had the Rams not spent so much on the pick, no one would have used the word 'bust' at all. And the proof is in the pudding. Goff is a franchise guy.
But, your point is well taken. The difference between Fisher, and co, and McVay and co, is the difference between winning, and losing. Dennison stinks. Get rid of him.