Did you create and follow a preparation plan?
Are you familiar with the Exam Content Outline (ECO)?
Are you aware of the existence of the exam reference list?
Did you go through the PMBOK 6th and 7th editions as well as the Agile Practice Guide?
Did you use any prep course/book?
Did you memorize the definition, functionality, and implication of every type of chart and diagram?
Did you memorize the functionality and implication of key theories?
Did you memorize the functionality and implication of different formulas?
Did you test your knowledge with different practice questions from different resources?
How many full-length mock exams did you take?