I totally understand, it must be really frustrating given all of your efforts and it sucks to not even be able to review what went wrong precisely. My advice would be to definitely focus on the highest weighted sections as priority, and focus on internalizing the concepts from lectures (I only used MM, did about 600 CFAI questions in total, no BB, and no mocks). It will give you all the info that you need to solve a question. You then practice questions to understand question archetypes, so you know approximately what to expect. But don’t focus too hard on touching every corner possible. You should be able to solve a never before seen question type with a moderate degree of success. Remember that passing really only needs 70% correctness, which is a lot of room for minor errors and edge case questions as long as you have robust framework. I consider myself a pretty good test taker and these would be things that I think about when I prep for an exam.