1 His confusion is that as long as you study hard, you will get good results, but the most experienced facts do not prove the previous results. In other words, using past experience to solve similar problems has failed, causing confusion.

2 Solution Strategy: Diligence can make up for mistakes, but with reasonable methods, a good schedule can improve the efficiency of learning. When encountering problems, in addition to previous experience, we should also use new methods (refer to the methods of others around us, consult teachers, etc. )

Personal opinion, for reference only.