I'll use the previous statements one at a time to build a case. I'll use only the statements that you have said or accepted. Everything I'm typing, has been said before.
People who are fine with their apps don't write reviews.
Ten percent of the user base (at most) write reviews.
This includes the people who want to complain more than the people who don't.
In this ten percent a fraction of reviews are negative.
A fraction of ten percent of the total users feel negatively about the app.
This is a rare occurrence.
If you feel I've misquoted any part then I apologize.
People who are fine with their apps don't write reviews.
Ten percent of the user base (at most) write reviews.
This includes the people who want to complain more than the people who don't.
In this ten percent a fraction of reviews are negative.
A fraction of ten percent of the total users feel negatively about the app.
This is a rare occurrence.
If you feel I've misquoted any part then I apologize.