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<p>Oh, I’ve definitely struggled in a class. 
And I know not everyone is great at everything… I’m absolutely not. But, please forgive the assumption, it seems like you are applying this to other situations than the one discussed. I’m not speaking about people who struggle in class - I’m speaking about the OP’s situation.</p>
<p>I would equate “struggling” as working hard and still getting D’s and C’s. Or perhaps working an average amount and failing. Studying 30 hours a week for multiple weeks for one class and still failing - does that really seem like am average struggling student to you? At 30 hours a week, plus attending class, something should be getting through. Do you really see 30 hours a week of studying + a failing grade = a simple case of someone having trouble in a class?</p>
<p>My point in posting this was not to make the OP feel stupid or anything like that. In fact, just the opposite as he seems to assume he is not intelligent since he failed despite his hard work. My point is to say that it is probably not a question of intelligence or hard work, but that there may be something else wrong (studying habits aren’t effective perhaps?) and he should discuss this with an academic advisor.</p>
<p>(I’m assuming for the sake of this thread the OP was not exaggerating about 30 hours a week, as that’s the thing that amazes me - if it’s less, then I can see this as a simple case of “struggling”.)</p>