[musicale]

I commend your modesty. In most CS (and EE) courses I'm familiar with, the homework is not mindless busywork but a path to mastery, though perhaps your school is different.

At many universities, students can also customize their course plan with department approval.

Usually you can take graduate courses without having completed the undergraduate prerequisites if you talk to the instructor. Perhaps you might find that more your speed.

If graduate courses are trivially easy for you and you've exhausted them all, you might consider taking the Ph.D. qualifying exams and moving directly into research.