While physicality is usually associated with defense, you can’t ignore the fact that an outstanding offense doesn’t just depend on great skill position play, it also depends on—more often than not—being physical and winning the line of scrimmage. And for several years, OU has done just that. Generally, their quarterbacks have time to throw; their running backs have holes; and their receivers have time to run routes.
Take the 2018 playoff game against Georgia, for example, who was ranked 6th in the nation in total defense, allowing an average of 168 yards passing and 126 yards rushing. OU gouged their defense for 289 yards passing and 242 yards rushing. And you don’t do that without being physically dominant and controlling the line of scrimmage.
Now, you might have a point if you’re only referring to their defense. But even then, I think you are mistaken when you say “OU continues to be humiliated…against teams with comparable talent”.
Losing previously to Alabama by 11 points and Georgia by 6 points is disappointing (for Sooner fans), but not humiliating. And as far as the “comparable talent” comment, last year’s LSU team had 14 players drafted to OU’s 4.
So yes, LSU embarrassed OU last year. No, the talent wasn’t comparable.