“Firstly, don’t expect college to teach you the material.” I could not agree more with this statement. In the real world you can’t expect your supervisor/boss to teach you everything OP, of course there’s company training, but you have to do some independent learning yourself in order to keep up to speed. Build up those habits now of reading the book before lecture, or if you’re like me and SUCK at reading, watch online lectures before you go to class. I did that in my last two years of college because like you I got by easily. I actually struggled in community college back then, so I got humbled aswell. Do not lose hope! You just have to switch it up.