I had decent grades in middle school and part of high school for a long while, but could never reach a GPA above 3.5 due to a number of factors. Ultimately, I started to slip near the end of my sophomore year, with me going from an A in Algebra II for the first semester to a C- in the second semester as I slacked off big time right before summer break. It carried over to my junior year, and then came my worst enemy: Pre-Calculus.
I could never understand it. I barely passed the first semester with a D-, and got an F (E in our district) during the second, thus resulting in me failing and needing to recover the credit. To be fair, I also slacked off as it was too tough for me to get a grasp on the topics, and gave up early. I also took an AP Macro class the same year, and hated it. I understood absolutely nothing, but somehow passed with a D- as I think the teacher saw that I gave a ton of effort on the final exam, and wanted me to pass despite failing almost every other assignment. All the other classes from then on also saw a major dip in grades due to my major slacking. I was able to graduate with the rest of my class on time, so that's cool.
Lastly, when it came to my brief college tenure, I went to two schools. One was a community college, where the change of pace threw me off entirely and thus I couldn't put in full effort on group assignments. I was so distraught from how different it was, that I even refused to help my group members in a video class for a group assignment. The teacher had to pull me out and have one-on-one talks frequently, and going to class at first caused my attitude to sour. It got a bit better over time, and I even took two summer classes to get some credits before deciding to transfer to a university. One of them was, of course, Pre-Calculus again. I actually gave a good amount of effort this time, and even had a tutor help me with homework, but I still failed miserably. The way they did tests (you had to schedule it yourself in a different room) was probably a good reason why I didn't do well the second time around. I passed the other class, which was an English course, so at least I got that.
I never bothered to check my grades for my lone semester of classes at the university I went to. I'm going to assume that I passed some and failed others. It doesn't matter to me anymore, as I ended up dropping out permanently with no plans to return anywhere else. I have a high school diploma with a CDL license, and that's all I need to start my career in commercial vehicle driving.