Two of my harder classes were:
General Physics I. One of my graduation requirements was a year of Physics. I chose General since it used non-calculus math. I bristled when a math professor that term referred to it as "Physics for Poets" because of how hard it was for me. I'm not sure if it was the extensive theory or lack of interest in the lectures, but I got a C on my first exam. Knowing i could have done better, I bought the study guide and put more effort into it - and still got a C on the next exam. So, i conceded I'd get a C in the class (and did) and focused on doing better in my other classes. General Physics II proved to be a little easier as I had a better time with studying electricity, magnetism, and optics. I even managed to get a B-minus.
20th Century American Literature. I took this class solely because i needed a fourth class and nothing else looked good that semester. I had American Lit in high school, but this was nothing like that. I was absent for a school function the day books were assigned for individual oral reports. So, I was stuck with a book I knew nothing about and nobody else wanted. Worst, the teacher was a feminist (this was before SJW but when PC was alive and becoming toxic), and no matter what I did, I couldn't get above a C on any assignment. Despite doing my best on my presentation and getting very positive feedback from my classmates - which was supposed to make up part of the grade - my teacher ripped the presentation to shreds in her written evaluation. Once again, I got another C. She must have been impressed by my final exam essay, though. My final grade was a C-plus.
Academic Research and Writing (A.K.A Comp 2): Course was themed on horror and fairytales.
That sounds a bit bizarre. My Comp 2 class focused on written argumentation and research. As mentioned, this was before college campuses were too immersed in the PC/SJW movement, so our writing exercises included topics such as "Should the US have bombed Hiroshima/Japan." I also enjoyed my final term paper and the research I did for it.
If I was taking the same major now, I'd have to take Technical Writing instead of Comp 2. Needless to say, I'm glad I went when I did for that and other reasons.