Yeah, as you highlight, Goff struggled when things weren't ideal. Being 16 in the league isn't great but isn't mediocre. All teams have some type of adversity. Better QBs learn how to handle it. This is where I want to see improvement. Russell Wilson had some weaker teams and he carried them. Even Kyler Murray is ranked ahead of Goff and Arizona wasn't a powerhouse. We've seen good Goff and we've seen bad Goff. "Bad" Goff isn't bad at all, just average. I am hoping that regardless of the reasons for his mistakes that he stop making them. Fewer INTs, fewer missed targets, fewer poorly thrown balls benefits the entire team.
I tend to be pessimistic but I believe that Goff is going to become better and better over time.