Team beat Oregon in Oregon, and competed with highly ranked Mich St team that's blowing everyone else off the court. Sometime during that game, Gilbert re injured his shoulder and things have regressed since that moment.
Now younger and less talented and less experienced kids have to fill bigger rolls. They can learn to do that, but it just doesn't happen quickly. It's not about flipping a light switch or something.
Hopefully Gilbert returns, and if he does we'll have a much more successful season. If he doesn't, we won't win as many games. That's just basketball 101