USC is who they are.
Last year, they lost 5 games - while giving up over 37 points per game vs P5 opponents - nearly dead last in the entire nation
And that team had Caleb Williams, Marshawn Lloyd, Austin Jones, Tahj Washington, and Brenden Rice as offensive playmakers (they are all gone to the NFL draft)
Their new QB - after lighting up Lousville in a bowl game, and a very good opener against LSU, has been very inefficient.
The new DC (former PSU guy) may be making some improvements to their D - but it is not yet close to being a top quality defense by any stretch.
Do they have enough raw talent to beat a good team when they play well? Sure - and they did that against LSU. Could they do that to PSU (assuming PSU helps them out a lot - as LSU did)? Sure.
They also managed to lose to two Big Ten teams that for all intents and purposes played without a D1 level QB. And they won't have that luxury on Saturday.