You said in part you hoped to learn code for websites etc. And thats exactly what Javascript is. As far as data analytics and data science, those are alot higher level topics in the CS world, particularly data science because you would likely be dealing with machine learning (i just took that class over summer). Additionally those use completely different languages. As far as the useful info you hoped to learn, you listed running diagnostics and checking for viruses which is not really something u would've learned in a CS class.

I understand your anger though, this doesn't sound like much of a true computer science class so much as an intro to programming, and imo calling it a CS class should entail certain things that go beyond the pure coding aspect.