Copmuter Science is a very broad topic, so I wouldn't be too worried. I'm taking a Graphics course this semester, and I can't stand it. That doesn't bother me though because I'm learning two important things from it: (1) a bit about how computer graphics work and (2) I should not become a graphics programmer.

I don't know what courses specifically you hate, but if you're first year my guess would be it's something related to theory, maybe Discrete Math? Anyway, don't freak out, just learn as much as you can from the course and move on to more interesting areas of CS :-)