Do not let it affect you, it can be downhearting i know.
Did you know the average hours needed for a PASS in the uk is 87!
I know many of people around your age and older (no affence) that have 90 to 100 hours and still have a fair bit to do. Also try a different flight school if you can, ive found that some flight schools have hardly any structure which leads to being all over the place and not progress.
In addition to the above make sure you do all the exams, doing them can make you more confident in the air and ive found that once they are done people tend to understand the term flying and will improve quicker.