If the above is something that resonates with you as a JC student, I can assure you that you are certainly not alone. From my time working as a MOE JC lecturer, I have come across many parents and students during Parent-Meet-Teacher sessions (conducted after students have fared poorly in the major examinations like JC1 Common Tests and JC2 Mid Year Exams) giving feedback that they have been overwhelmed by the sheer amount of academic workload and the various other commitments such as CCAs, competitions and Project Work.
Many students also find difficulties adapting to the Lecture-Tutorial system. For lectures, it is a one way method of communication from teacher to student and the pace can be too fast for some students. Another challenge is that if you lose focus just for a short period of time, you can be completely lost and not understand the remaining part of the lecture. Unfortunately, most school lecturers and tutors will not entertain requests of re-teaching the entire topic if you missed or lost your focus during the lecture. In the end, you have to spend vast amount of time reading and digesting your lecture notes by yourself.
Personally, I do not think that is an efficient method of learning. I can tell you that I can easily explain and emphasize the main points of each topic for every subject in 5 to 10 minutes. Then, you can better spend your time working through the different types of questions, hone your application skills, identify your common mistakes so that you can perform and excel during examinations.
I see my role as a tutor who can shorten your learning curve, guide you to spot and excel in the commonly tested questions for each subject, build your thinking capacity to answer the higher order thinking questions.