In retrospective now I know that I unconsciously sabotaged myself, I knew the best way to pass subjects was to have a basic understanding of the theory and then practice a lot of exam question examples, but I just couldn't get myself to do that until I had in fact understood the theory in depth.

That led to my grades ending up exactly average, but also at one point I challenged myself and got the highest marks in the most difficult course in my degree. Everyone, specially those who were normally top of the class, were like "WTF did you do??" lol