My interest in a subject usually depends on how a course is taught
A lot of people find certain subjects very difficult in themselves. For me, at least most of the time, my interest in a course in university almost always depends on the teaching style. I have been taking chemistry and physics over the past couple of years, and my love for the course almost always depended on how well organized and explained the material is and how accessible support is. During Grade 12 Physics, my teacher just wrote everything on the blackboard and rattled on, then dumped a whole load of homework on me and made quizzes on short notice. The way the course was done made me hate physics with a burning passion. The same for Grade 11 chemistry, albeit a whole lot less rushed. However, upon doing university level physics online, I lost all my hatred for it, since I could book my exams, the material was well explained and TAs were accessible. I also stopped hating chemistry when I took a course at university, since the notes were easy to grasp and there were many resources available. However, my hatred for chemistry reignited stronger than ever when I took another chemistry course, because the material was not well written, the TAs were hard to reach, only gave the course material in one proprietary format, not to mention they make you do labs in which they just dump a bunch of chemicals on you, expect you to provide several expensive chemicals on your own and then give you a terribly written lab manual to do them with many of the experiments requiring (yes, requiring, not just if your slow) days to complete, not to mention they force you to do it within a certain time period and then fail you if you do not complete every last lab. I'd rather flip burgers at McDonald's than become a millionaire doing that subject.
Basically, for me, whether a course is enjoyable or not depends on how well it is taught, and often not so much on the content itself (unless it is incredibly mundane).
Would you say this is normal?