Whether it be education, sports, any job/ business, relationships, etc, any person who experiences any failure in any area of life is because THEY WERE NOT GOOD ENOUGH!
What do I mean by saying that a person is not good enough as being the main factor/ cause of any failures that they have in any area of their lives?
It means that a particular person who failed in any type of endeavor that they had already undertaken in the past, did not read enough, did not study hard enough, did not practise hard enough, and did not train hard enough in developing their own set of unique knowledge, skills and experiences.
In other words, they did not spend enough time, they did not spend enough effort, and they did not spend enough money, in preparing themselves well enough to become successful in any pursuit that they had previously taken.
If a person was really and truly GOOD ENOUGH in any area of their lives, they would definitely be able to experience success in any area of their lives that they desire.
In order to be successful in the achievement of any goals, a person must spend enough time, they must also spend enough effort, and they must spend enough money, in acquiring all the many different knowledge bases, skill sets, and experiences, that will help them to be successful consequently.
A successful person reads enough, studies hard enough, practises hard enough, and trains hard enough, so much so that success will eventually be in their grasp in the end after all the reading, hard studying, hard practising, and hard training that they have already invested in improving themselves as much as possible.
Success can certainly be traced and tracked - no person in the world becomes successful by accident and/ or by luck, it is always directly attributed to a person having worked very hard for a very long period of time very consistently.
Professional investigators of successful people have acknowledged that it takes a total estimated time of about 10,000 hours of very focused serious formal specialized practising and hard training, before any person can reach the level of an expert in any field.
There is simply no shortcut whatsoever to success.
You just have to work very hard over a long period of time regularly, in order to ensure that you stand a good chance of achieving success after working so hard over such a considerable/ substantial amount of time.