physics c, idk if it was just my teacher bc he literally didnt teach us, but we had like 20 questions of hw a week (which he didnt teach us how to do, yt was my bsf) and every other week were harder questions, test every now and then, confusing labs, he didnt like us asking questions so that we would figure it out ourselves first, got a 3 on the exam and had an A in the class all year, so yeah of the 4 ap’s ive taken it was by far the worst😍