Defense is really bad. Coaches know (hopefully) that the defense is really bad. At 23-7 you still have a chance in the second half, albeit a small one. At 30-7 this team is cooked. With all of that known already - why did they not run more clock on the last offensive drive and make sure you go into the half down at most 23-7?
That is what I am most disappointed with from the worst half of Illinois football we have seen this season.