Definitely much much deeper than Petras. Not being to run the ball at all is the root of the problem. Having zero playmakers on offense is a huge problem. Today Iowa State has the best QB by far, best RB by far, atleast the 3 best WR's, and the best offensive line by far. Talent evaluation in recruiting is surely a huge problem. Not using the portal to fill holes is a huge problem. Not being able to identify holes in the offense before it is too late is a big problem. Not being able to recruit QB's that can use their legs when they need to is a big problem.
We will see what happens, it won't stay this way forever. Nobody can keep a job, whether it is a player or coach, with consistent performances as bad as this, especially now after losing. Change will happen sometime, we just don't know what that looks like right now. But everyone needs to know that this offense will struggle mightily this entire year even though they may improve. It is very very limited and will continue to be.