Due to billions of 1st-Round Draft Picks in the last 2 years, they were light on game experience and seniority in the receiving core. Very light. And yet, they opted for a pass-heavy, Q.B.-centric, pocket-focused offensive scheme. The results were underwhelming, especially against good defenses and relative to their talent level.
As for Saban "slipping," they just had one of the greatest teams ever in 2020, lost in the finals in 2021 after their #1 receiver went down, and were 1 game away from the playoffs last year.
But by all means, carry on.