It's not that the Dak supporters don't think Dak hasn't got some fault, for the vast majority of us anyway. He does, and I've said so myself - too many missed "easy" throws, holds the ball too long too often, etc. Though ALL quarterbacks play a flawed game, no such thing as a perfect quarterback, or perfect season (the Dolphins team didn't lose a game, but they played some poor games along the way, and had a very easy schedule, perfect record but hardly a perfectly played season).
But look at it this way - 31 quarterbacks (roughly, some didn't play the whole year, etc.) failed last year. There's only one winner. If people want to complain about Dak not winning the SB, then let the ragging on Mahomes, Rodgers, Brees, etc. commence, they have to have all the "if only" label applied to them as well.
Winning the SB is hard, it takes skill, a good team and luck along the way to do it. If Norwood makes the 47 yard field goal, Bills win. But he didn't, and the Bills didn't. Does that mean Kelly couldn't win a SB unless he has all Pros on the o-line, etc? Of course not, that had nothing to do with him.
No quarterback wins a SB all by himself, or on a bad team, don't care how good he is....