I agree that once you obtain an intuitive understanding of any topic, what once seemed incomprehensible is suddenly completely trivial. It's just getting to that stage that requires a lot of work. I studied computer science also and spent a ton of hours staring at equations. I figured it out eventually, and maybe I'm just slower than you, but it wasn't nearly as simple as you made it sound.

Getting back to the point: if you really weren't that challenged by your coursework, why didn't you seek more challenging material? I find it hard to believe that everything you could ever study in college would be so easy for you, or anyone for that matter. It's just a shame b/c you say how college is mostly worthless because you weren't really challenged, but it sounds like you could've gotten more out if it if you studied something that pushed your boundaries more.