Goff was a bust in year 1. He looked lost and didn't know how to play. Had no confidence. Couldn't read anything. But the real reason is he had no options and the defenses knew that the Rams ran nothing on offense and only had to defend a handful of plays in the middle of the field.
Now, he is an elite player.
In fact, I would rank Goff at the moment, the 3rd QB that I would take.
1) Rodgers
2) Brady
3) Goff
He looks a little like Rodgers but not quite as confident adjusting in the pocket and not as strong physically.