Football at just about every level is determined by three units on the field: quarterback, offensive line, and defensive line. Notice the last four teams remaining in last year’s playoffs: the four best teams at the line of scrimmage. Take it a step further and look at the Super Bowl: New England was the best coached team on the offensive and defensive line, and the Rams had arguably the highest level of talent on both sides as well.
Now, look at the Vikings comparatively to both teams. Other than Aaron Donald, neither team has close to the level of talent on the defensive side of the ball, but neither were undone by poor offensive line play either.