I suspect, given it's such a young team, that this was the case where they allowed one very deflating loss against Clemson to snowball into another awful performance against BC. It's happened with the pro team in Atlanta, too, so if it can happen to seasoned pros it's not surprising it happened to a group that's heavy on underclassmen. That's not an excuse, but it's part of the reality of what happened.
Two things that the coaching staff rightly deserves to be criticized for: 1.) They still seem unable to correct Sims' ball handling issues. This was the 3rd or 4th time Sims just put the ball on the carpet without anyone really touching him. 2.) The slow starts and the inability to play 60 minutes of consistent football. Yes, the defense was terrible today, but the slow start by the offense was a classic example of really bad complementary football. Coming off the performance against Clemson, that can't happen. The coaches need to know that. Sims needs to know that as a player in a leadership position. At some point the hard lessons need to start to stick.