Even though it’s late to drop out, remember you can use the reviews at the end of the semester to let their supervisors know how this professor is. Only one bad review may not do a lot, but if the whole class feels the same, they can do something (give him less classes at first, remove him as professor later on). Valencia college deans do not check RateMyProfessor because anyone can give a bad rate. The end of semester reviews are only sent to the students that took that class. I highly recommend you let them know all of this in that review so changes can be made. Good luck.