The thing I hate most about this is realizing that graduate school is going to be even worse. Like, five times worse. I feel stupid now... just imagine what it'll be like then =/
I don't know what it would be like for math, but in my case graduate school was two of the happiest years of my life. I was finally at a level where it felt like all my fellow students were as bright and engaged in the material as I was. Not to sound egotistical or anything, but there were big parts of undergrad that were like pulling teeth because of having to suffer through people in my classes that quite simply had no business being there. Like the guy in one of my history courses that needed an entire class devoted to him not understanding how to do footnotes, until the rest of the class finally said, "Dude...STFU. Go to the Writing Center. This is not the place for that."
Or the people in my earth science pre-req class that still couldn't grasp latitude and longitude after two whole classes. (That was the same class that after the first exam, my prof took me aside and told me, "Look...just show up for the exams. You don't need to waste your time here the rest of the time.")
Grad school was hard enough that I couldn't just slack off and rely on my superior test-taking skills to skate by. And interesting enough that I actually wanted to be there. And it's an entirely different environment when your professor can legitimately say, "Okay, we're going to hold class at the bar across the street tonight," and class consists mostly of drinking beer and arguing about the reading material at a highbrow level.