<Snipped quote by Meta>
Reason I did so bad is because I wasn't getting given as much practice time for the various topics as I was in high school. We were practically given all the time in the world in high school calc classes to pracice, to the point that we never really had to do anything at home. Here, it's not like that, and I was avoiding practicing in my own time because I never did it before, so I didn't think I'd need to. Also, calc 3 is a little more difficult than I thought it would be.
College not quite what you were expecting?