Is it possible to drop RSM100 during the school year and take it in the summer instead?

First year Rotman student here; I just spent the last hour laughing at Khan's reviews on Rate My Professors—before remembering that I'm in his class. All I've heard is that his test questions are hard and irrelevant, his teachings aren't useful, the course will singlehandedly ruin my GPA, and that lots of people end up failing and just taking RSM100 over the summer (with a better professor). Is there a way to drop out now and sign up for the summer? If I talk to an advisor about this, will I need a better reason to drop out, or are my concerns with Khan reasonable enough?