The thing is, Goff from the beginning never really looked like an NFL QB to me. McVay did everything he could to make it work, and then doubled down on Goff saying stuff like "the QB is the system." Perhaps not, ay?
NFL teams continually fear that they can't afford to let a QB walk. But more often than not they can't afford not to. Because they have to set the market, they can't afford to maintain the line, skill positions, etc. And then all of a sudden the team struggles!