Hi @roseri!!! I agree with your idea that Chemistry is somewhat difficult. I am not a science teacher by the way but I will base my opinion with the experience that I had when I was still in High School.
The difficulty in grasping the concept of Chemistry is in maximum level especially when there are no enough tools, equipments, or materials that may somehow aid the discussion. Listening to facts and concepts may be easy but visualizing all of those with the use of drawings in a textbook will never leave an impact to students. That may somehow be seen to students who forgot the lesson easily because the information was stored as a short term memory.
However, I still appreciate the efforts of my teachers before and even now I look up to them. It is just that, maybe here in my country, we have a lack of resources/materials that can help the teachers and students in facilitating learning.
Thank you for sharing this @roseri!!!