It sounds like you're just at the wrong school. No worries, that happens sometimes. Have you looked into transferring to someplace with a more challenging CS curriculum?
PS: Thanks for your help, I really appreciate that
An alternative suggestion: pick the CS professor you have the highest regard for, and go ask him/her what you should do. "I love this subject, but I'm bored here. What should I do?"
Assuming that your work in their class backs up the "I'm too smart for this class" judgment, they may be very happy to help you work through your options. Maybe you can just take a test and get a bunch of credits without having to sit through years of classes, or there's an advanced program for grad students you can get into, or they know of a stellar CS department at another school that would be right up your alley. Never hurts to ask.
Good luck! Or since you're in Austria, maybe I should say viel Glück :-D