If it is your perception you are gaining slowly, you are making a mistake. If it is your teachers perception you are gaining slowly, it is your responsibility to learn from that whatever the teacher is bringing forth. As a student, you must put aside your perceptions and rely on the teacher to teach you about the new life you have chosen. As a student, you have not chosen a new life for the teacher. As a student, you have not chosen to be the teachers teacher and tell them what to teach and how to teach and when to teach and whether their teaching is correct or not.
All teachers teach correctly all the time for the path that they teach.
Read that over a few times and get it down, it is accurate and important. As a student it is not appropriate to force a schedule on the teacher. If you demand a time, place, progress, select the part to be taught, practice the portions you chose, turn away from the parts of the teaching you decide are not for you, and so on, you have brought a teacher into your life for you to abuse. As a student it is not appropriate to chose the teaching you want and reject the portion you do not want. You have the responsibility to chose a path.